THE TOOLBOX FOR EVERY NUMBER YOUR MUSTANG NEEDS.
S650 Dark Horse to Fox-body - horsepower, boost, compression, fuel injectors, quarter-mile, gearing, tire size and dyno correction. Free, fast, mobile-first. Bookmark it in the garage. Use it at the dyno. Win the bench race.
EVERY CALCULATOR IN THE SHOP
BUILT FOR PONIES, NOT POWERPOINTS.
MustangMath is the free calculator hub for Coyote builders, Voodoo owners, supercharged Cobra restomods and Fox-body weekend warriors. Every tool was built to answer one question fast: what is the number, and do I trust it? No paywalls. No email gates. No spinning wheels.
Verify a chassis-dyno sheet with the horsepower calculator. Run the effective compression calculator before you order pulleys. Size injectors with the fuel injector calculator so a 700-hp Whipple build does not lean out at peak. Convert tire sizes, predict 1/4-mile ET, and fix speedometer error after a regear.
Tuning forced induction? Pair turbo boost target with intercooler outlet temp and SAE dyno correction to compare hot-day pulls to a 60 F baseline. Mixing pump 91 with E85? The E85 blend calculator gets the tank to your exact target ethanol content.
READ THE MANUAL
DROP IT IN YOUR GLOVEBOX.
Works offline once cached. Save it to your home screen at the track.