Biology

Calculate theoretical plants per acre from spacing or estimate an emerged stand from repeated live-plant counts.

Estimate mowing cost per visit and per month using flat or hourly pricing, yard adjustments, and optional add-ons.

Estimate grass seed needed by lawn shape, seeding rate, buffer, and bag size for new lawns or overseeding.

Convert corn, wheat, soybeans, oats, barley, sorghum, or rye between bushels, pounds, US short tons, and metric tons.

Calculate daily or total growing degree units with simple, capped, or floor-only methods in Fahrenheit or Celsius.

Calculate fertilizer product pounds and whole bags to buy from package coverage or an N-P-K nutrient recommendation.

Convert between PPFD, light hours, and DLI, and check whether extra light hours can reach your target within your daily limit.

Estimate corn yield in bu/acre from ear and kernel counts, then convert to total field bushels and 15.5% dry bushels.

Check your compost greens and browns balance and calculate how much material to add toward your target mix.

Estimate CO2 needed for a grow room dose, average flow rate, exhaust loss, and rough tank duration in one simple calculator.