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Conversion Calculators
Length, weight, temperature, area, volume, time, and every unit conversion you need.
33 free calculators · No signup required
What Are Conversion Calculators?
Length, weight, volume, temperature, speed, data storage — if you've ever needed to convert between metric and imperial (or decode an international sizing chart at 11pm while online shopping), these tools do it instantly. I use the temperature and cooking converters more often than I'd like to admit.
Every converter handles multiple units in both directions and shows the conversion formula so you can verify the math yourself. Bookmark the ones you use most — they load fast, they're always free, and they'll be here when you need them.
Frequently Asked Questions
How do you convert Celsius to Fahrenheit?
Multiply by 1.8, then add 32. So 25°C = (25 × 1.8) + 32 = 77°F. Going the other way, subtract 32 first, then multiply by 5/9. Or just use the converter — nobody memorizes these formulas.
How many grams are in an ounce?
About 28.35 grams (28.3495 if you need precision). For quick mental math, round to 28. One pound (16 oz) is roughly 454 grams, or 0.454 kg.
How many centimeters in an inch?
Exactly 2.54 cm. One foot is 30.48 cm, and one meter works out to about 39.37 inches (or 3.28 feet). That 2.54 number is precise — it's defined, not approximated.