Use this Seed Rate Conversion tool to calculate the kg/ha of seed you require based on your planned seed rate/m² and the Thousand Grain Weight.

To convert a specific value not listed enter the 'Seeds/m²' and 'Thousand Grain Weight (g)' values below and click on '='

Seeds/m²Thousand Grain Weight (g)Conversion

 kg/ha

Seed Rate Conversion Quick Chart

Thousand Grain Weight (g)
	35	40	45	50	55	60
150	53	60	68	75	83	90
175	61	70	79	88	96	105
200	70	80	90	100	110	120
225	79	90	101	113	124	135
250	88	100	113	125	138	150
275	96	110	124	138	151	165
300	105	120	135	150	165	180
325	114	130	146	163	179	195
350	123	140	158	175	193	210
375	131	150	169	188	206	225
400	140	160	180	200	220	240
425	149	170	191	213	234	255
450	158	180	203	225	248	270

All values above are rounded to the nearest whole number