Conversion calculator

Plant nutrient

P from/to P2O5

K from/to K2O

Ca from/to CaO

Mg from/to MgO

S from/to SO3

Ca from/to CaCO3

Na from/to Na2O

Na from/to NaCl


Nitrate (N)

Ammonium (N)

Phosphorus (P)

Potassium (K)

Calcium (Ca)

Magnesium (Mg)

Sulphur (S)

Boron (B)

Copper (Cu)

Iron (Fe)

Manganese (Mn)

Molybdenum (Mo)

Sodium (Na)

Zinc (Zn)

Chloride (Cl)

Bicarbonate (HCO3)

Yield and rate

kg-ha from/to lb-acre

kg-m3 from/to lb-bu

kg-ha from/to 60lb

kg-ha from/to 56lb

kg-ha from/to 48lb

kg-ha from/to cwt-acre

kg-ha from/to units-acre

kg-ha from/to bags-acre

L-ha from/to gallon-acre

L-ha from/to imperial gallon-acre

L-ha from/to US gallon-acre

m3-ha from/to gallon-acre

t-ha from/to lb-acre

t-ha from/to t-acre

Mg-ha from/to lb-acre

Mg-ha from/to ton-acre

meter-s from/to mile-h


m3 from/to acre-in

m3/h from/to ft3/s

m3/h from/to gal/m

ha-m from/to acre-ft

ha-m from/to acre-in

ha-cm from/to acre-ft


cmol-kg from/to meq 100g

g-kg from/to %

mg-kg from/to ppm

mg-kg from/to ppb


g from/to lb

g from/to oz

kg from/to lb

kg from/to q

kg from/to ton

Mg from/to ton(US)

tonne from/to ton(US)


MPa from/to atmosphere

MPa from/to bar

Pa from/to lb-ft

Pa from/to lb-in

Pound per square inch from/to bar


K from/to C

C from/to F

Check out the latest agronomy advice

These articles will help you get even better results from your fertilisers by keeping you up to date with the latest agronomy advice from the Yara agronomists. If you don't find the advice you are looking for try looking in our full advice archive.