Conversion calculator

Plant nutrients

The nutrient content of fertilisers can be declared as either oxide or elemental. These converters allow conversions between the two units.

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

Fertigation

Fertigation and water analyses can be reported as a concentration of nutrients (mmol per litre) or as the weight of nutrients (mg per litre). These converters allow you to easily switch between the two units.

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

Various units can be used to express weight per area for measurement of crop yield or fertiliser application rates. These converters allow conversions between common metric and imperial units.

kg-ha from/to lb-acre

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

Irrigation volume

Various units are used to measure the amount of water applied to an area for irrigation. Here are some conversions between the common metric and imperial units.

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

Concentrations

Quick conversions between commonly used units for measuring concentrations.

cmol-kg from/to meq 100g

g-kg from/to %

mg-kg from/to ppm

mg-kg from/to ppb

Weight

Quick conversions between commonly used metric and imperial units for measuring weight.

g from/to lb

g from/to oz

kg from/to lb

kg from/to ton

Pressure

Quick conversions between commonly used units for measuring pressure.

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

Temperature

Quick conversions between commonly used temperature scales.

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.

Fertiliser application advice for first cut silage crops

Fertiliser applications for first cut silage have been really hampered by the weather since mid-March. This is a very worrying situation as these first cuts constitute a large part of next winters forage.

Maximising your vegetable crops’ potential with foliar nutrition

With the amount of rainfall we've had, a lot of the nutrients in the soil will potentially have leached away.

Spring 2024 Nutrition Management

There’s no getting away from the wet conditions many have faced this autumn and winter. We can now try and manage some of the issues this has caused via a robust spring nutrition strategy with the following steps

Looking for something else ? Check our full advice archive