Liquid Fertilizer Converter

How the Liquid Fertilizer Converter Works

The Liquid Fertilizer Converter divides fertilizer mass by product density. The default 1.28 kg/L matches UAN-28 (urea ammonium nitrate, 28% N).

Pick the product
Choose UAN-28, UAN-32, 10-34-0, ATS, KTS or another solution from the table.
Enter the density
Use the density from the table or the product label (lb/gal ÷ 8.345).
Enter the mass
Type the fertilizer weight in kilograms.
Read the liters
Use the result to set sprayer tanks and nutrient rates per hectare or acre.

The liquid fertilizer formula is V = m ÷ ρ. Nutrient per liter equals ρ × nutrient %.

V = m ÷ ρ

N (kg/L) = ρ × N% ÷ 100

Product (L/ha) = Target N (kg/ha) ÷ N (kg/L)

UAN-28: 1,000 kg ÷ 1.28 = 781.3 L.
Nitrogen per liter, UAN-32: 1.325 × 0.32 = 0.424 kg N/L (3.54 lb N/gal).
Rate: 100 kg N/ha ÷ 0.358 kg N/L = 279 L/ha of UAN-28.

UAN-28 weighs 1.28 kg/L (10.68 lb/US gal) and carries 0.358 kg of nitrogen per liter. The table lists 7 liquid fertilizers.

Product (Analysis)	Density (kg/L)	lb per US gal	Liters per Tonne	Main Nutrient per Liter
UAN-28 (28-0-0)	1.280	10.68	781	0.358 kg N
UAN-32 (32-0-0)	1.325	11.06	755	0.424 kg N
APP (10-34-0)	1.390	11.60	719	0.473 kg P₂O₅
ATS (12-0-0-26S)	1.330	11.10	752	0.346 kg S
KTS (0-0-25-17S)	1.460	12.18	685	0.365 kg K₂O
Calcium nitrate (CN-9)	1.410	11.77	709	0.127 kg N
Starter (3-18-18)	1.330	11.10	752	0.239 kg P₂O₅

A Liquid Fertilizer Converter is a calculator that converts liquid fertilizer weight into volume and nutrient content using solution density.

Liquid fertilizers are concentrated salt solutions. Dissolved urea, ammonium nitrate, phosphates and thiosulfates push density 28–46% above water.

Fertilizer analysis lists N-P₂O₅-K₂O percentages by weight, not volume. A volume rate on a sprayer needs density to turn into a nutrient rate.

There are 4 main uses of a Liquid Fertilizer Converter.