Garden & environment

Work out the CO2e of a regular commute by transport mode, per week and per year, using UK DEFRA conversion factors

Work out how much grass seed a lawn needs, for a new lawn or overseeding, and how many bags to buy

Estimate the CO2e of a flight from its distance and cabin class, using UK DEFRA conversion factors with and without radiative forcing

Work out the expected harvest window from a sowing date and the days to maturity

Work out when to sow seeds indoors, from the last frost date and the number of weeks before it

Count boundary-to-boundary positions on a square or staggered grid in a rectangular bed

Work out the annual cost and CO2e of home electricity and gas use, and the effect of changing one of them, using UK DEFRA conversion factors

Work out how much fertiliser to apply for an area, from its N-P-K ratio and a target nitrogen rate

Estimate carbon dioxide absorbed by a group of trees over a chosen period