250+ free calculators for trades, home and everyday life
Top 30 — know the fair price before you hire
See allPlanning an extension or a whole house?
Realistic cost, three budget scenarios and a week-by-week build timeline in the right order — from planning to keys.
305+ tools · refreshed weekly
Every calculation.One universe.
From room measurements and material costs to health, finance, food and engineering — find the right answer in seconds.
- Whole Build & Extension Planner — Cost, Timeline & Build OrderFeatured
- Car & Van Carbon FootprintFeatured
- Fireplace, Fuel & Room HeatingFeatured
- AI Face AgeThis week
- Booklet Page ImpositionThis week
- Tattoo Session PriceThis week
- Paella Pan Diameter → PortionsThis week
- Book Spine Width & PaperThis week
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Explore this week’s orbit — new useful calculators rotate into view every Monday.
Fair Price Home Jobs
One fixed price for the whole job — not by the hour.
Oven & Hob Installation
Radiator Replacement
Patio Paving
Block Paving Driveway
Concrete Base & Slab
Single-Storey Extension
Internal Door Hanging
Bathroom Refit
Garden Fence Installation
Gutter Clean & Replacement
Consumer Unit (Fuse Box) Upgrade
Combi Boiler Replacement
Laminate & Wood Floor Fitting
Plastering & Skimming
Stud Partition Wall
Decking Installation
Window Replacement
Exterior House Painting
Room Decorating
Tree Surgery & Stump Removal
Roof Leak Repair
Loft Insulation
Kitchen Worktop Fitting
Wall Tiling & Splashback
Home EV Charger Installation
Shed Demolition & Garden Clearance
Toilet, Basin & Tap Replacement
Kitchen Fitting
Garage Conversion
Loft Conversion
House Rewiring
Damp Proofing
House Rendering
Wall Knock-Through & Steel Beam
Shower Installation
Carpet Fitting
Garden Wall
Artificial Grass
Turfing
Resin Driveway
Drain Unblocking
Worktop Resealing & Silicone
Porch Build
Conservatory Roof Replacement
Chimney Breast Removal
Cooker Hood / Extractor Fitting
Solar Panel Installation
Air Source Heat PumpClimate & Environment
Photo, carbon and material tools
Estimate vehicle CO2, plan roof materials with less waste, and turn photos into editable estimates.
Vehicle carbon
Car & Van Carbon Footprint Calculator
Identify a car, see its CO2
Fire & room heating
Fireplace, Fuel & Room Heating Calculator
Fuel, comfort and carbon
Meal intelligence
AI Food Photo Calorie Estimator
Food, portions and macros
Room survey
Camera Room Measurement & Materials Calculator
Openings, surfaces and materials
Roof materials
Roof Tile & Replacement Materials Calculator
Tiles, battens and less waste
Private 18+ experience
AI Face Age Estimator (18+)
A playful, no-storage estimate
Calculator of the week
One genuinely useful calculator, every Monday
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Featured tools
Start with Calcurly.com’s most useful calculators
Three standout tools lead the collection, followed by practical everyday calculations.
Fast everyday answer
Whole Build & Extension Planner — Cost, Timeline & Build Order
Plan a house extension or a whole new house: realistic 2026 UK cost, three budget scenarios, materials vs labour, and a week-by-week build timeline in the order the work must happen.
Open calculatorAI photo analysis
Car & Van Carbon Footprint Calculator
Estimate CO2 from any car or van worldwide — petrol, diesel, hybrid, LPG or electric, by engine size (litres or kW), age and distance in km or miles — and see how many trees offset it.
Open calculatorMeasure once, price every trade
Fireplace, Fuel & Room Heating Calculator
Compare wood, coal, pellets, gas, LPG, oil and charcoal by useful heat, room-temperature rise, carbon output and indoor air-quality risk.
- Camera-assisted windows and doors
- Flooring, paint, boards, studs and fixings
- Editable dimensions and transparent ±15% price range
Age Calculator
Find an exact age, age on another date, estimated birth date, and the next birthday countdown.
AI Food Photo Calorie Estimator
Photograph a meal to identify each food and repeated piece, estimate weight ranges, calories, protein, carbohydrates, and fat, then correct portions instantly.
Camera Room Measurement & Materials Calculator
Measure a room, detect windows and doors from wall photos, preview proportions in 3D, and price flooring, paint, plasterboard and metal-stud materials.
AI Face Age Estimator (18+)
Upload or take a face photo to get a playful visual age range estimate. Adults only, explicit consent required, and the photo is never stored.
Roof Tile & Replacement Materials Calculator
Count roof tiles, battens, membrane, ridge tiles and fixings for a full re-roof or a partial repair, with waste and an optional cost estimate.
Percentage Change Calculator
Calculate percentage increase, decrease, difference and reverse percentages.
Date Difference Calculator
Calculate days, weeks, months and weekdays between two dates.
Time Duration Calculator
Add, subtract and compare hours, minutes and seconds.
Trip Fuel Cost Calculator
Estimate trip fuel, total cost, cost per passenger, and carbon emissions.
Discount & Sale Price Calculator
Calculate sale price, savings, stacked discounts, tax and reverse original price.
Pregnancy Due Date Calculator
Estimate a due date and current pregnancy week from the last menstrual period or conception date.
Daily Water Intake Calculator
Estimate daily fluid needs from weight, activity, climate, pregnancy and breastfeeding.
Body Surface Area Calculator
Calculate body surface area using Mosteller, Du Bois and Haycock formulas.
Describe the job. Find the right tools.
Tell us what you need to measure, price, size, or convert. You’ll get the best matching calculators and practical steps.
Browse by industry
Each industry hub lists every calculator on one page — directory style.
Fair Price Home Jobs
Brutally realistic time and one fixed price for household jobs — ovens, radiators, patios, concrete bases, extensions and more.
48 calculators →
Unit Converters
Length, weight, volume, temperature, speed, pressure, energy, data and more.
12 calculators →
Construction & Building
Concrete, brickwork, roofing, framing, loft floors and material take-offs with full cost estimates.
13 calculators →
Plumbing
Pipe sizing, flow rate, pressure drop and water heater sizing with material + labour costs.
2 calculators →
Electrical
Ohm's law, voltage drop, wire gauge, conduit fill and energy cost.
3 calculators →
Automotive & Mechanic
Torque, MPG, tyre size, gear ratio and engine displacement.
5 calculators →
Painting & Decorating
Paint coverage, wallpaper rolls, primer — with full cost-per-m² breakdown.
1 calculators →
Landscaping & Gardening
Mulch, topsoil, fertiliser, sprinkler coverage and fencing with cost estimates.
1 calculators →
Cooking & Baking
Cups to grams, oven temps, recipe scaling, hydration and cost-per-portion.
2 calculators →
Fitness & Health
BMI, BMR/TDEE, body fat, 1RM, pace and macros.
8 calculators →
Finance
Mortgage, loan, compound interest, tip, sales tax and ROI.
14 calculators →
Roofing
Shingles, underlay, gutters and roof area by pitch.
4 calculators →
Flooring & Tiling
Tile count, laminate planks, hardwood board feet and tile adhesive.
3 calculators →
HVAC & Climate
BTU sizing, duct CFM, AC tonnage and heat-loss estimates.
6 calculators →
Solar & Renewables
Panel count, battery bank, off-grid load and payback period.
4 calculators →
Swimming Pool
Volume, chlorine and salt dosing, heater sizing.
3 calculators →
Agriculture & Farming
Seed rate, NPK fertilizer, irrigation flow and silage.
7 calculators →
Cleaning Services
Cleaning time, carpet cost and supply consumption.
2 calculators →
Catering & Restaurants
Portion sizing, food cost %, menu pricing and drink counts.
5 calculators →
Print & Sign Shop
Ink coverage, vinyl roll, booklet imposition and job pricing.
2 calculators →
Photography & Video
DOF, hyperfocal, exposure equivalents and shoot pricing.
2 calculators →
Moving & Removals
Truck size, box count, moving labour and storage volume.
2 calculators →
E-commerce & Retail
Margin, markup, break-even, shipping cost and inventory turn.
5 calculators →
Marketing & Ads
ROAS, CAC/LTV, CTR, CPC and email open rate.
4 calculators →
Freelance & Consulting
Target hourly rate, project quote and tax set-aside.
3 calculators →
Woodworking & Joinery
Board feet, stain coverage, sheet yield and edge banding.
3 calculators →
Welding & Fabrication
Rod consumption, gas flow and weld cost per metre.
2 calculators →
3D Printing
Filament weight, cost per print and resin volume.
2 calculators →
Events & Weddings
Headcount catering, bar quantities, venue capacity and seating.
4 calculators →
Pet Care
Dog food, cat litter and aquarium dosing.
2 calculators →
Real Estate & Rental
Rental yield, cap rate, BRRRR, stamp duty and break-even rent.
5 calculators →
Plastering & Drywall
Plasterboard sheets (1200×2400/2500), skim coat and drywall screws — EU sizing.
3 calculators →
Rendering & Stucco
Sand-cement-lime external render mixes for European facades.
1 calculators →
Floor Screeding
Sand-cement and liquid floor screed by m² and thickness.
1 calculators →
Insulation
Loft and cavity insulation roll counts to UK/EU building-regs depths.
1 calculators →
Glazing & Windows
Double/triple-glazing area and U-value heat-loss costs.
1 calculators →
Scaffolding
Scaffold hire by linear metre, lifts and weeks.
3 calculators →
Chimney & Flue
Flue sizing for stoves and sweep cost.
1 calculators →
Thatching
Norfolk reed and long-straw bundle counts for thatched roofs.
1 calculators →
Stonemasonry
Dry-stone and pointed wall tonnage.
1 calculators →
Carpet Fitting
Carpet rolls (EU 4 m / 5 m widths), underlay and gripper.
1 calculators →
Kitchen Fitting
EU 600 mm base units, worktops and fit-out cost.
1 calculators →
Bathroom Fitting
Suite, tiling and refit cost.
1 calculators →
Turf & Lawns
Turf rolls (1 m²) and topsoil bed.
1 calculators →
Arborist & Tree Surgery
Tree felling cost by height and access.
1 calculators →
Fencing
UK 6 ft panels, posts and postcrete.
1 calculators →
Block Paving
200×100 mm blocks, sub-base and jointing sand.
1 calculators →
Pond Building
EPDM/butyl liner sizing and pond volume.
1 calculators →
Beekeeping & Apiary
Honey yield and jar counts.
1 calculators →
Winemaking
ABV from OG/FG hydrometer readings.
1 calculators →
Brewing & Homebrew
ABV and IBU for beer recipes.
2 calculators →
Cheesemaking
Cheese yield from raw milk by type.
2 calculators →
Patisserie & Boulangerie
Croissant tourage and bakery ratios.
1 calculators →
Butchery
Carcass yield by species.
1 calculators →
Florist
Bouquet pricing with EU florist markup.
1 calculators →
Tailoring & Dressmaking
Fabric metres at EU widths (110/140/150 cm).
1 calculators →
Upholstery
Sofa re-cover fabric metres.
1 calculators →
Jewellery
Karat & scrap value from EU hallmarks (375/585/750/916).
1 calculators →
Perfumery
EDP/EDT dilution from concentrate.
1 calculators →
Soap Making
Cold-process lye and water from SAP values.
1 calculators →
Candle Making
Soy/paraffin wax weight for a batch.
1 calculators →
Pottery & Ceramics
Clay shrinkage for stoneware/porcelain.
1 calculators →
Blacksmithing
Forge coal/coke consumption.
1 calculators →
Glassblowing
Soda-lime gob weight for blown pieces.
1 calculators →
Bookbinding & Print
Spine width and paper GSM.
1 calculators →
Window Cleaning
Per-window pricing with frames/sills.
1 calculators →
Dry Cleaning
Machine load and solvent top-up.
1 calculators →
Locksmith
Euro-cylinder TS007 lock change costs.
1 calculators →
Cycle Shop
Gear ratio, development and speed.
1 calculators →
EV Charging
Charge time and cost at EU tariffs.
1 calculators →
Heat Pumps
Air-source heat pump kW and running cost.
1 calculators →
Boilers & Heating
Combi boiler kW from radiators + bathrooms.
1 calculators →
Wood Burners & Firewood
Stere ↔ cord, weight and heat output.
1 calculators →
Solar Thermal
Collector area for household hot water.
1 calculators →
Rainwater Harvesting
Tank size from roof area and EU rainfall.
1 calculators →
EU VAT
Add/remove VAT at any EU rate (19–27%).
2 calculators →
IBAN Tools
Validate an IBAN with mod-97 check.
1 calculators →
Stamp Duty / SDLT
UK SDLT for residential purchases.
1 calculators →
EU Energy Labels
Annual running cost from kWh/year labels.
2 calculators →
Agritourism & Gîtes
Annual revenue from nightly rate and EU occupancy.
1 calculators →
Exhibitions & Trade Shows
EU stand cost from m², build and staffing.
1 calculators →
Truffle Orchards
Inoculated oak/hazel yields for Périgord, Burgundy and summer truffles.
1 calculators →
Saffron Farming
Crocus bulbs, m² and ROI for dried saffron production.
1 calculators →
Olive Oil Press
Olives to EVOO yield by variety with bottling math.
1 calculators →
Jamón Ibérico Curing
Weight-loss curing of pata negra over 24–36 months.
1 calculators →
Champagne Cellar
Riddling pupitres, dégorgement and cellar floor area.
1 calculators →
Buffalo Mozzarella
Milk to mozzarella DOP yield for cow and buffalo.
1 calculators →
Cognac & Armagnac
Angel's share evaporation in oak-barrel ageing.
1 calculators →
Aceto Balsamico
Modena 5-barrel solera cascade annual draw.
1 calculators →
Parmigiano Reggiano
Cow-milk to wheel math and herd sizing.
1 calculators →
Peat Bog Harvest
Sleán-cut peat brick yield and heating value.
1 calculators →
Heather Honey
Hives per heather moor and seasonal honey yield.
1 calculators →
Heliciculture
Snail-farm stocking density and edible yield.
1 calculators →
Lavender Distillation
Flowers to essential oil mL by yield %.
1 calculators →
Indoor Wasabi
Stem yield and revenue for indoor Wasabia japonica.
1 calculators →
Mushroom Substrate
Spent coffee grounds to oyster mushroom yield.
1 calculators →
French Autoroute Tolls
Péage cost by km and vehicle class across France/Italy.
1 calculators →
ULEZ / CAZ Zones
Daily and annual clean-air-zone charges.
1 calculators →
Swiss & Austrian Vignettes
Cross-Alpine road-tax sticker costs.
1 calculators →
Channel Crossing
Dover–Calais ferry vs Eurotunnel cost & time.
1 calculators →
Interrail Pass
Break-even days for an Interrail / Eurail pass.
1 calculators →
Coach vs Train
FlixBus / Eurolines vs high-speed rail on cost and CO₂.
1 calculators →
EU Drone Class
A1/A2/A3 categories, exam and registration fees.
2 calculators →
Game Shoots
Driven pheasant shoot cost per gun and tipping.
1 calculators →
Livery Yards
DIY, part and full livery annual cost.
1 calculators →
Dressage Arena
Sand, fibre and rubber tonnage for a 20×60 m FEI arena.
1 calculators →
Hedgelaying
Stakes and binders per metre of laid hedge.
1 calculators →
Coppice Woodland
Hazel / sweet chestnut yield per hectare.
1 calculators →
Willow Basketry
Withies per basket and bundles to order.
1 calculators →
Shepherding & BPS
Lamb crop and EU/UK basic-payment subsidy.
1 calculators →
Alpaca Fibre
Fleece kg to spun yarn skeins.
1 calculators →
Cheese Affinage
Cave volume and humidifier load for ageing wheels.
1 calculators →
Curing-Salt Safety
Pink salt grams and ingoing nitrite ppm vs EU/USDA limits.
1 calculators →
Raclette Dinner
Cheese, potatoes and charcuterie per guest.
1 calculators →
Swiss Fondue
Gruyère/Vacherin, wine and kirsch ratios.
1 calculators →
Basque Pintxos
Cold/hot pintxos and txakoli per guest.
1 calculators →
Oktoberfest Catering
Bratwurst, pretzels and Festbier per guest.
1 calculators →
Paella
Pan diameter to portions, bomba rice and saffron.
1 calculators →
Crêpes & Galettes
Breton crêpe batter by guest count.
1 calculators →
Bakery Batches
Trays, dough and oven cycles for focaccia / sourdough.
1 calculators →
Amsterdam Houseboat
Mooring fees and insurance for canal living.
2 calculators →
Venice Acqua Alta
Cost to raise a Venetian ground floor by N cm.
1 calculators →
Deposit Return
German Pfand / NL Statiegeld annual refund.
1 calculators →
Green Roofs
Sedum and intensive green-roof saturated load.
1 calculators →
Nordic Sauna
Annual birch firewood for a wood-fired kiuas.
1 calculators →
Geothermal Heating
Underfloor heat demand and heat-pump electricity.
1 calculators →
Norway EV Tolls
Annual bompenger savings vs ICE vehicles.
1 calculators →
German Rolladen
Shutter-box size, slat length and motor torque.
1 calculators →
Velux Daylight
Rooflight quantity for 10% glazing rule.
1 calculators →
Passivhaus Check
Annual heat demand vs 15 kWh/m²·a target.
1 calculators →
Cork Oak Harvest
Cork kg and revenue from a Portuguese montado.
1 calculators →
Reptile Vivariums
Basking-lamp wattage and UVB tube sizing by species and enclosure volume.
1 calculators →
Scuba Diving
SAC / RMV rate and gas planning from tank pressure, depth and dive time.
1 calculators →
Tattoo Studios
Session estimates from size, style, artist rate and shop minimum.
1 calculators →
Nail Salons
Per-client cost and margin for gel manicures.
1 calculators →
Escape Rooms
Weekly revenue and payback from slot pricing and utilisation.
1 calculators →
Podcast Production
Storage and bandwidth from episode length, bitrate and downloads.
1 calculators →
Vinyl Record Pressing
Per-unit LP cost for EU pressing plants including plating and jackets.
1 calculators →
Vending Machines
Route profit from vends, COGS and site commission.
1 calculators →
Ski & Snowboard Wax
Grams of hot wax per session by length and snow temperature.
1 calculators →
Home Sauna Build
Kiuas kW rating and stone weight from cabin volume.
1 calculators →
Manufacturing & Production
OEE, throughput, cycle time and line-balancing for factories and workshops.
1 calculators →
Sustainability & ESG
Carbon accounting, ESG reporting and EU CSRD/CBAM compliance calculators.
1 calculators →
Remote & Distributed Teams
Cross-border salary conversion, cost-of-living parity and remote payroll planning.
1 calculators →
SaaS & Startups
Burn rate, runway, ARR, MRR, CAC/LTV and unit economics for software businesses.
1 calculators →
Logistics & Freight
Cross-border shipping, customs duty, brokerage fees and Incoterms landed-cost math.
2 calculators →
Popular now
Calculators professionals use next
construction
Concrete Volume Calculator
Work out concrete volume in m³ or yd³ plus how many bags you need for any slab, footing or column.
painting
Paint Coverage Calculator
Work out how many litres or gallons of paint you need for a room or wall.
plastering
Metal Stud & Track Partition Calculator
Calculate metal tracks, studs, noggins, fixings, plasterboard and estimated material cost for an internal partition wall.
finance
Mortgage Calculator
Monthly mortgage payment, total interest and amortisation summary.
electrical
Ohm's Law Calculator
Solve for voltage, current, resistance or power given any two of V, I, R or P.
automotive
Torque Converter (Nm ↔ ft-lb)
Convert torque between Newton-metres, foot-pounds, inch-pounds and kgf·m.
Materials + labour costs
Every applicable calculator includes a cost estimate. Pick budget, standard or premium materials and see the real cost — including the trap where cheap paint needs 3 coats and costs more.
Local tradesperson sponsors
Each industry has a regional sponsor slot. Visitors in your area see your business at the moment of intent. One slot per region — get yours.
Sponsor a region →Free, fast, shareable
No login needed. Every calc has a shareable URL — paste your result into a quote or chat.