Convert Anything
Instant, accurate conversions across health & fitness (BMI, water intake and more), birthday weekday, currency (live rates), temperature, length, area, volume, mass, speed, energy, pressure, power, force, angle, density, data storage, time, a duration calculator (days ↔ hours ↔ minutes ↔ seconds), a Roman numeral converter (both ways), a number base converter (binary, decimal, octal & hexadecimal), plus aviation tools (fuel uplift & MEL rectification).
Health & Fitness
BMI · water intake · BMR · ideal weight · body fat
Normal weight
Birthday Weekday
Find the day of the week for any birthdate
You were born on a Wednesday — 15th August 1990
Currency
Live exchange rates · 46 currencies
Temperature
Celsius · Fahrenheit · Kelvin · Rankine
Length / Distance
13 units
1 m = 0.001 km
Area
10 units
1 km² = 1,550,003,100 in²
Volume
12 units
1 tsp = 0.33333243 tbsp
Mass / Weight
9 units
1 oz = 0.06249995 lb
Speed
6 units
1 kn = 0.00149984 Mach
Energy
9 units
1 Wh = 0.001 kWh
Pressure
7 units
1 psi = 51.71509578 mmHg
Data Storage
10 units
1 MB = 0.95367432 MiB
Time
9 units
1 h = 0.04166667 day
Power
10 units
1 mW = 0.00000134 hp
Force
9 units
1 kgf = 1,000 gf
Angle
7 units
1 ′ = 60 ″
Density
8 units
1 g/mL = 62.42796047 lb/ft³
Duration Calculator
Convert freely between days, hours, minutes & seconds
Roman Numerals
Convert both ways · 1 to 3999 (MMMCMXCIX)
Standard form uses I, V, X, L, C, D, M · largest value is 3999 (MMMCMXCIX)
Number Base Converter
Binary · Decimal · Octal · Hexadecimal — both ways
Enter a value in any base — binary, decimal, octal or hexadecimal — to see all four at once.
Fuel Uplift
Aviation refuelling — mass to volume
Load 2,500 kg (3,125 L) of fuel
MEL Rectification
Minimum Equipment List due date
Select the defect discovery date