Converters and calculators

Every one of these is the same tool: a notepad where you type the calculation in plain language and read the answer beside it. Pick a starting point.

Calculators

• Percentage off calculator
• Percentage of a number
• Percentage increase calculator
• Tip calculator
• Currency converter
• Days between dates
• Time zone converter

Lab values

Clinical units, where the conversion depends on the substance.

• Glucose mg/dL → mmol/L
• Cholesterol mg/dL → mmol/L
• Triglycerides mg/dL → mmol/L
• Creatinine mg/dL → µmol/L
• Bilirubin mg/dL → µmol/L
• Urea (BUN) mg/dL → mmol/L
• Uric acid mg/dL → µmol/L
• Calcium mg/dL → mmol/L
• Vitamin D (25-OH) ng/mL → nmol/L
• Vitamin B12 pg/mL → pmol/L
• Hemoglobin g/dL → mmol/L
• Albumin g/dL → µmol/L
• Blood alcohol (ethanol) mg/dL → mmol/L
• Lactate mg/dL → mmol/L
• Testosterone ng/dL → nmol/L
• Estradiol (estrogen) pg/mL → pmol/L
• Progesterone ng/mL → nmol/L
• Cortisol µg/dL → nmol/L

Length

• Inches to centimeters 1 = 2.54 cm
• Centimeters to inches 1 = 0.393701 in
• Feet to meters 1 = 0.3048 m
• Meters to feet 1 = 3.2808 ft
• Miles to kilometers 1 = 1.6093 km
• Kilometers to miles 1 = 0.621371 mi
• Millimeters to inches 1 = 0.03937 in
• Inches to millimeters 1 = 25.4 mm
• Centimeters to feet 1 = 0.032808 ft
• Feet to centimeters 1 = 30.48 cm
• Yards to meters 1 = 0.9144 m
• Meters to yards 1 = 1.0936 yd

Weight

• Kilograms to pounds 1 = 2.2046 lb
• Pounds to kilograms 1 = 0.453592 kg
• Grams to ounces 1 = 0.035274 oz
• Ounces to grams 1 = 28.3495 g
• Stone to kilograms 1 = 6.3503 kg
• Kilograms to stone 1 = 0.157473 st
• Tonnes to pounds 1 = 2,204.6226 lb
• Pounds to tonnes 1 = 0.000454 t

Volume

• Liters to gallons 1 = 0.264172 gal
• Gallons to liters 1 = 3.7854 L
• Milliliters to fluid ounces 1 = 0.033814 fl oz
• Fluid ounces to milliliters 1 = 29.5735 mL
• Cups to milliliters 1 = 240 mL
• Milliliters to cups 1 = 0.004167 cup
• Pints to liters 1 = 0.473176 L
• Liters to pints 1 = 2.1134 pt

Temperature

• Celsius to Fahrenheit 1 = 33.8 °F
• Fahrenheit to Celsius 1 = -17.2222 °C
• Celsius to Kelvin 1 = 274.15 °K
• Kelvin to Celsius 1 = -272.15 °C

Speed

• Kilometers per hour to miles per hour 1 = 0.621371 mph
• Miles per hour to kilometers per hour 1 = 1.6093 km/h
• Knots to miles per hour 1 = 1.1508 mph
• Miles per hour to knots 1 = 0.868977 kn
• Meters per second to kilometers per hour 1 = 3.6 km/h
• Kilometers per hour to meters per second 1 = 0.277778 m/s

Data

• Megabytes to gigabytes 1 = 0.001 GB
• Gigabytes to megabytes 1 = 1,000 MB
• Gigabytes to terabytes 1 = 0.001 TB
• Terabytes to gigabytes 1 = 1,000 GB
• Kilobytes to megabytes 1 = 0.001 MB
• Megabytes to kilobytes 1 = 1,000 KB
• Mebibytes to megabytes 1 = 1.0486 MB
• Megabytes to mebibytes 1 = 0.953674 MiB
• Gibibytes to gigabytes 1 = 1.0737 GB
• Gigabytes to gibibytes 1 = 0.931323 GiB

Area

• Square feet to square meters 1 = 0.092903 m²
• Square meters to square feet 1 = 10.7639 ft²
• Acres to hectares 1 = 0.404686 ha
• Hectares to acres 1 = 2.4711 acre

Time

• Minutes to hours 1 = 0.016667 h
• Hours to minutes 1 = 60 min
• Hours to days 1 = 0.041667 days
• Days to hours 1 = 24 h
• Days to weeks 1 = 0.142857 weeks
• Weeks to days 1 = 7 days
• Seconds to minutes 1 = 0.016667 min
• Minutes to seconds 1 = 60 s

Screen & CSS

• Pixels to points 1 = 0.75 pt
• Points to pixels 1 = 1.3333 px
• Pixels to em 1 = 0.0625 em
• Em to pixels 1 = 16 px

Angle

• Degrees to radians 1 = 0.017453 rad
• Radians to degrees 1 = 57.2958°