⚡ConvertProf

Convert anything, instantly

15 categories and a scientific calculator, using exact conversion factors from NIST instead of rounded guesses.

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Quick conversions

1 mile = 1.609 km1 lb = 0.454 kg32°F = 0°C1 gal = 3.785 L🔧 SAE ↔ Metric🌍 Meeting planner

Conversion categories

Pick a category and results appear as you type

📏Length8 units⚖️Weight6 units🌡️Temperature3 units📐Area6 units🧪Volume6 units🚀Speed4 units⏱️Time7 units💾Data5 units🍳Cooking8 units🏃Pace5 units⚡Energy8 units🔌Power6 units📜Historical Units9 units⚱️Historical Mass6 units🗺️Historical Area5 units
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Time zone meeting planner

Compare working hours across cities and find a meeting time that suits everyone, with daylight saving handled for you.

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Automotive tools

SAE and metric wrench sizes, torque in ft-lb and Nm, and drill bit sizes in inches and millimeters.

Popular conversions

The conversion pages people search for most

Cups to Grams Converter
Convert cups to grams (ml-equivalent) for baking and cooking. Quick reference table for flour, sugar, butter and more.
Tablespoons to Milliliters Converter (tbsp to ml)
Convert tablespoons (tbsp) to milliliters (ml) instantly. Includes US tablespoon = 14.7868 ml conversion table.
Teaspoons to Milliliters Converter (tsp to ml)
Convert teaspoons to milliliters (1 tsp = 4.92892 ml). Perfect for recipes and medication doses.
Cups to Milliliters Converter (cup to ml)
1 US cup = 236.588 ml. Convert between cups and milliliters with our quick reference table.
Min/km to Km/h Converter
Convert your running pace from minutes per kilometer to kilometers per hour. Plan races and training instantly.
Min/Mile to Km/h Converter
Convert minutes per mile to kilometers per hour for runners. Quick pace calculator with reference table.
Min/km to Min/Mile Pace Converter
Convert running pace between min/km and min/mile. Essential tool for runners training across metric and imperial units.
Calories to Joules Converter (cal to J)
1 calorie = 4.184 joules. Convert between calories and joules for nutrition, physics and chemistry calculations.
Kcal to Kj Converter
Convert kilocalories (kcal) to kilojoules (kJ) for food labels and nutrition. 1 kcal = 4.184 kJ.
kW to HP Converter
Convert kilowatts (kW) to mechanical horsepower (HP). 1 kW ≈ 1.341 HP. Used for car engines and motors.
HP to kW Converter
Convert horsepower (HP) to kilowatts (kW). 1 HP ≈ 0.7457 kW. Standard for engine power conversions.
Pood to Kg Converter
1 pood ≈ 16.38 kg. Convert the historical Russian mass unit pood to kilograms. Approximate value for historical contexts.
Verst to Kilometers Converter
1 verst ≈ 1.0668 km. Convert the historical Russian length unit verst to kilometers.
Cubit to Centimeters Converter
1 cubit ≈ 45.72 cm. Convert the ancient cubit (forearm length) to centimeters. Approximate historical value.
Desyatina to Hectares Converter
1 desyatina ≈ 1.0925 hectares. Convert historical Russian land area to hectares.

Why ConvertProf?

Many online converters round silently. ConvertProf uses exact, sourced factors, verified against NIST and the 1959 international yard and pound agreement.

Exact factors

1 inch is exactly 2.54 cm. 1 lb is exactly 0.45359237 kg. No rounding tricks.

Runs in your browser

Every calculation happens on your device, so results appear instantly.

Context included

Each category explains the formula, the history and real-world uses.

15 categories

From everyday units to historical Russian pood, verst and desyatina.

About this project

ConvertProf started as a personal cheat sheet for converting US baking recipes to a European kitchen scale. It grew into a public tool when we realised that many popular converters quietly use rounded factors: fine for casual use, but not for customs paperwork, car registration or medication doses.

Every formula is sourced, every category page is reviewed before publication, and reported errors are fixed promptly. Read more on our About page or browse the guides in our blog.

Found a unit we missed or a result that looks wrong? Email hello@convertprof.com or use the contact form.