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Convert any unit. Calculate anything that matters.

132 unit conversions with exact factors and full charts, plus ten practical calculators for money, health and growth.

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Converters by category

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📏 Length 9 units · 24 pairs ⚖️ Weight 7 units · 14 pairs 🌡️ Temperature 3 units · 6 pairs 📐 Area 6 units · 10 pairs 📦 Volume 7 units · 14 pairs 🏎️ Speed 4 units · 8 pairs ⏰ Time 8 units · 14 pairs 💾 Data Storage 7 units · 12 pairs 💨 Pressure 5 units · 8 pairs ⚡ Energy 6 units · 8 pairs 🔌 Power 5 units · 6 pairs ⛽ Fuel Economy 4 units · 8 pairs

Calculators

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🏠 Mortgage Calculator Estimate the monthly payment, total interest and payoff date for a fixed-rate mortgage. 💳 Loan Calculator Work out the payment and total cost of a personal, auto or student loan. 📈 Compound Interest Calculator Project an investment with monthly contributions and see the yearly growth. 🎯 Savings Goal Calculator Find the monthly amount needed to reach a savings target, or the time it will take. ％ Percentage Calculator Three percentage tools: X% of Y, X is what percent of Y, and percentage change. 🏷️ Percent Off Calculator Discount price and money saved, including stacked discounts. 📊 Percentage Increase Calculator Measure an increase or decrease between two values, with the difference. ⚖️ BMI Calculator Body mass index with the healthy weight range for your height. 🔥 Calorie Calculator Daily calories from the Mifflin-St Jeor equation, by activity level and goal. 🔋 TDEE Calculator Maintenance calories by activity level, with BMR and a per-level table.

Guides

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BMI: What It Measures and When It LiesThe BMI formula, correct units, category thresholds, and the well-documented cases where BMI misleads — athletes, elderly, and ethnic differences.Celsius to Fahrenheit: the Honest GuideThe exact °C to °F formula, the 2x+30 travel trick, oven conversions and why weather and cooking need different precision.How to Convert a PDF to Word (Without Losing Formatting)Which PDFs convert to Word cleanly, which never do, free methods that work, and how to fix broken tables after conversion.

Popular conversions

cm → inCentimeters to Inchesin → cmInches to Centimeterskg → lbKilograms to Poundslb → kgPounds to Kilogramskm → miKilometers to Milesmi → kmMiles to Kilometers°C → °FCelsius to Fahrenheit°F → °CFahrenheit to Celsiusm → ftMeters to Feetft → mFeet to MetersL → galLiters to US Gallonsgal → LUS Gallons to Literskm/h → mphKilometers per Hour to Miles per Hourmph → km/hMiles per Hour to Kilometers per HourGB → MBGigabytes to MegabytesMB → GBMegabytes to GigabyteskPa → psiKilopascals to PSIpsi → kPaPSI to Kilopascalskcal → kJKilocalories to KilojouleskJ → kcalKilojoules to KilocalorieskW → hpKilowatts to Horsepowerhp → kWHorsepower to Kilowattsmpg → L/100kmMiles per Gallon (US) to Liters per 100kmL/100km → mpgLiters per 100km to Miles per Gallon (US)

What ConvertHub does

ConvertHub is a set of static, fast-loading tools. The conversion pages use published definitions: the inch is 2.54 cm, the international pound is 0.45359237 kg, the nautical mile is 1,852 m, and so on. Where a unit is approximate by nature — Mach, average months, fuel economy — the page says so instead of pretending the number is exact.

The calculators cover the questions people actually search for: a mortgage payment, the true cost of a loan, compound growth, a percentage change, BMI and daily calories. Each one shows the formula and the assumptions, so you can check the output instead of trusting a black box.

No account, no paywall, no email capture. The site is funded by advertising, which is why you will see ad slots on the pages.