About this calculator

Total = area × rate per hectare. Adjust upward for poor seedbeds or late drilling; many crops increase rate 5–15% past the optimum window.

Frequently asked questions

What does the Seed Rate Calculator do?

Total seed needed for a field at a given sowing rate. Total = area × rate per hectare. Adjust upward for poor seedbeds or late drilling; many crops increase rate 5–15% past the optimum window.

Is the Seed Rate Calculator free to use?

Yes. Every calculator on Calcurly.com is free, works in your browser without sign-up, and can be embedded on your own website.

How accurate is the Seed Rate Calculator?

Results are calculated in real time using industry-standard formulas. Treat the output as a well-informed estimate — always cross-check with local regulations, product datasheets, or a qualified agriculture & farming professional before committing to a purchase or a job.

What inputs does the Seed Rate Calculator need?

Enter values for: Field area (ha), Seed rate (kg/ha). Sensible defaults are pre-filled where possible so you can start with a single change.

Can I embed the Seed Rate Calculator on my own website?

Yes — copy the iframe snippet at the bottom of this page, or use the Embed Generator to customise the size. The embedded version stays in sync with the live calculator on Calcurly.com.