📐 Aquarium Units Converter
Weight, length, volume, temperature, pressure, hardness, concentration, salinity – all in one place
Milligrams metric
mg
Grams metric
g
Kilograms metric
kg
Ounces us
oz
Pounds us
lb
Millimeters metric
mm
Centimeters metric
cm
Meters metric
m
Inches us
in
Feet us
ft
Yards us
yd
Milliliters metric
ml
Liters metric
L
US Gallons us
US gal
UK Gallons uk
UK gal
Cubic feet us
ft³
Cubic inches us
in³
Celsiusmetric
°C
Fahrenheitus
°F
Bar metric
bar
Pounds per sq inch us
psi
Kilopascals metric
kPa
Degrees GH (dGH)metric
dGH
ppm (mg/L CaCO₃)us
ppm
Parts per million metric
ppm
Parts per billion metric
ppb
Percent metric
%
Millilitres per Litre metric
ml/L
Milligrams per litre metric
mg/L
Drops per Litre (0.05ml) metric
drops/L
Drops per UK Gallon (0.05ml) uk
drops/UK gal
Drops per US Gallon (0.05ml) us
drops/US gal
Temperature°C/°F
Specific Gravity (SG)
SG
Salinity
ppt (‰)
📊 Salinity Chart (SG vs ppt at different temperatures)
Target salinity range:
🎨 Green = optimal | Yellow = caution | Red = dangerous
About This Aquarium Units Converter
I got tired of jumping between different websites every time I needed to convert gallons to litres, inches to centimetres, or pounds to kilos. So I put all the conversions I use most into one simple tool.
Now you can convert weight, length, volume, temperature, hardness, concentration, salinity and pressure – all in one place. Just type a number, and the rest update right away.
Use it when you’re setting up a tank, measuring ferts, or comparing gear. If you keep fish, this little tool will save you time and clicks.
Hope it helps you as much as it helps me.