JETALT
The clean-flight numbers, made simple — free calculators for jet-fuel CO2, SAF blends, fuel burn, fuel energy density, hydrogen and battery range, and fuel cost, plus plain-English guides to sustainable aviation fuel, electric and hydrogen aircraft, and cutting flight emissions.
From the CO2 of a tank of jet fuel and the savings from a SAF blend to the fuel a flight burns, the energy packed into hydrogen and batteries, and what it all costs, JetAlt pairs free hands-on calculators with plain-English guides and a museum of flight and its fuels. Understand the numbers behind cleaner aviation.
Aviation Fuel & Emissions Calculators
Free tools for the numbers behind cleaner flight — jet-fuel CO2, SAF savings, flight fuel burn, fuel energy content, hydrogen & battery range, and fuel cost per flight.
Jet Fuel CO2 Emissions Calculator
Turn a quantity of jet fuel into the CO2 it releases when burned, using the standard 3.16 kg of CO2 per kg of Jet A
SAF Blend & CO2 Savings Calculator
See how much lifecycle CO2e a sustainable aviation fuel blend saves versus conventional Jet A, from the blend and its reduction
Flight Fuel Burn Calculator
Estimate fuel burned from distance and aircraft class — regional, narrowbody, or widebody — with litres, CO2, and per passenger
Fuel Energy Content Comparison Calculator
Compare Jet A, SAF, liquid hydrogen, and batteries by energy per kg and per litre, and see why gravimetric and volumetric energy differ
Hydrogen / Battery Aviation Range Calculator
Estimate range for jet fuel, hydrogen, and batteries from the same on-board mass, once drivetrain efficiency is taken into account
Fuel Cost per Flight Calculator
Turn a fuel quantity and unit price into the fuel bill for a flight, in litres, gallons, or kg, with an optional cost per seat
Flight & Fuel Museum
Step into an illustrated museum of flight and the energy behind it — the aircraft and engines that carry us aloft, the fuels and energy carriers they run on, the alternative and electric aircraft now taking shape, and the story of aviation and the atmosphere, each in its own gallery. Get to know the machines, the fuels, and the physics behind how — and how cleanly — we fly.
Tour the museum →From the Journal
Fresh guides on sustainable aviation fuel, jet-fuel and emissions, electric and hydrogen aircraft, and flight efficiency, plus plain-language explainers on the science and economics of cleaner aviation.
Electric Jets: Pioneering the Future of High-Speed Sustainable Aviation
The Future of Flight: How Hydrogen Jets Are Revolutionizing Aviation
The Invisible Engine: Understanding Jet Fuel's Role in Aviation Innovation
Advanced Biofuel Jets Techniques and Methods
The Future Takes Flight: Innovations Shaping Sustainable Aviation
Advanced Jet Engines Techniques and Methods
Keep Learning
Plain-language explainers on jet fuel and combustion, sustainable aviation fuel, electric and hydrogen flight, and how aviation affects the climate — everything you need to read the numbers behind cleaner flight with confidence.
Visit the Learn hub →