Climate & Sustainability Calculators
Measure your carbon and water footprint, size solar and LED upgrades, compare EV and transit options, and discover greener choices with our climate calculators.
15 free tools · no sign-up, no adsCarbon Footprint Calculator
Estimate your yearly CO2 emissions from energy and travel.
Climate CalculatorDiet Carbon & Water Footprint
See the CO2 and water hidden in your weekly diet.
Health CalculatorEV vs Petrol Calculator
Compare EV and petrol running costs and break-even distance.
Climate CalculatorElectricity Cost Calculator
Estimate appliance running cost, units used, and CO2 emissions.
Climate CalculatorFlight Emissions Calculator
Estimate CO2 from your flight by distance and cabin class.
Climate CalculatorFood Waste Impact Calculator
Turn wasted food into money, water, and CO2 lost each year.
Climate CalculatorFuel Cost Calculator
Estimate fuel expense and required volume for trips.
Financial CalculatorHousehold Water Footprint
Add up showers, toilets, laundry, and garden water use.
Climate CalculatorLED Upgrade ROI
Calculate lighting savings, CO2 cut, and payback period.
Climate CalculatorLeak Cost Calculator
See the water and money lost to dripping taps and leaks.
Climate CalculatorPhantom Load (Vampire Power)
Find the cost of devices left on standby all year.
Climate CalculatorPublic Transit vs Driving
Compare commute cost and CO2 for transit against driving.
Climate CalculatorRainwater Harvesting Potential
Estimate how much rain your roof can collect each year.
Climate CalculatorSolar Panel Calculator
Size a rooftop solar system and estimate payback period.
Climate CalculatorTree Offset Calculator
Convert your emissions into trees and years to absorb them.
Climate CalculatorExplore Other Categories
Climate & Sustainability Calculators
Carbon, energy, water & green living.
15 calculatorsUnit & Conversion Calculators
Units, currencies, time zones & measurements.
11 calculatorsDeveloper & Web Tools
Encoding, hashing, JSON, regex & web utilities.
25 calculatorsEducation & Student Calculators
Grades, GPA, percentage & study helpers.
16 calculatorsFinancial Calculators
Loans, investments, tax, salary & money planning.
37 calculatorsHealth & Fitness Calculators
BMI, calories, fitness, pregnancy & medication.
20 calculatorsMath Calculators
Numbers, algebra, geometry & everyday arithmetic.
26 calculators