Compare calculators

Both calculators run independently — change the inputs on either side to compare results.

Carbon Offset Cost Calculator

Calculate the annual cost of offsetting a chosen percentage of your CO₂ emissions through renewable energy, reforestation, or methane capture programs. Useful for corporate sustainability budgeting or personal carbon neutrality planning.

Annual CO₂ Emissions (tons)

Offset Program Type

Percentage to Offset

Offset Timeframe

Fill in the required fields to see your result.

Climate

Evapotranspiration Calculator

Estimate monthly potential evapotranspiration (PET) from average temperature, daylight hours, and days in the month using a simplified Thornthwaite-style formula. Returns millimetres of water lost per month.

Average Temperature (°C)

Daylight Hours (hours)

Days in Month (days)

Fill in the required fields to see your result.

Key differences

	Carbon Offset Cost Calculator	Evapotranspiration Calculator
Category	Climate	Climate
Inputs required	4	3
Result	Total Offset Cost ($)	Potential Evapotranspiration (mm/month)
What it does	Calculate the annual cost of offsetting a chosen percentage of your CO₂ emissions through renewable energy, reforestation, or methane capture programs. Useful for corporate sustainability budgeting or personal carbon neutrality planning.	Estimate monthly potential evapotranspiration (PET) from average temperature, daylight hours, and days in the month using a simplified Thornthwaite-style formula. Returns millimetres of water lost per month.