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 timber, soil and rough cost for building a raised bed of a given size

Estimate how many trees it would take to absorb a given amount of CO2, and roughly how long that takes, using a widely cited UK rule of thumb

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

Estimate a yearly household carbon footprint from home energy, car travel, diet and flights, using UK DEFRA conversion factors

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

Estimate household water use per person per day and where it typically goes, against the UK average

Work out how much water a bed needs per week, by plant type and weather

Estimate the CO2e saved by recycling given weights of aluminium, steel, glass, plastic and paper, using WRAP figures

Work out how many plants fit a bed at a given spacing, laid out in rows or staggered

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

Work out how much browns to mix with greens by volume to hit a target carbon to nitrogen ratio

Work out how much lime or sulphur to apply to move soil pH toward a target, by soil type

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