Free Online Calculators for Every Job
1800+ easy, accurate calculators and unit converters for construction, math, money, health, cooking and more. No sign-up, works on any device.
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Construction40 calculatorsMath47 calculatorsFinancial35 calculatorsHealth & Fitness31 calculatorsConversionUnits & convertersTime & Date18 calculatorsCooking16 calculatorsElectrical18 calculatorsAutomotive17 calculatorsScience23 calculatorsPets13 calculatorsShipping & Logistics12 calculatorsTV & Video12 calculatorsEveryday Life15 calculators
Popular calculators
Math
- Average Calculator
- Fraction Calculator
- Percentage Calculator
- Pythagorean Theorem Calculator
- Area Calculator
Cooking
- Cooking Conversion Calculator
- Cups to Grams Calculator
- Pizza Dough Calculator
- Recipe Scale Conversion Calculator
- Baking Pan Size Converter
Electrical
- Electricity Cost Calculator
- Ohm's Law Calculator
- Watts to Amps Calculator
- Wire Size Calculator
- Amps to Watts Calculator
Automotive
- Fuel Cost Calculator
- Gas Mileage Calculator
- Horsepower Calculator
- Tire Size Calculator
- Car Cost per Mile Calculator
Pets
- Aquarium Volume Calculator
- Dog Age Calculator
- Dog Food Calculator
- Cat Age Calculator
- Cat Food Calculator
Shipping & Logistics
- CBM Calculator
- Dimensional Weight Calculator
- Freight Class Calculator
- Pallet Calculator
- Chargeable Weight Calculator
TV & Video
- Aspect Ratio Calculator
- TV Mounting Height Calculator
- TV Size Calculator
- TV Size to Viewing Distance Calculator
- PPI Calculator (Pixels Per Inch)
Accurate & transparent
Every calculator shows the formula it uses and a worked example, so you can check the math yourself.
Built for real jobs
Enter feet, inches and fractions like 5 1/2, mix metric and imperial units, and switch result units instantly.
Fast on any device
Lightweight pages that load instantly on phones, tablets and job-site laptops. Free with no sign-up.