What is the formula for 0-60 mph?

Three formulas are commonly used. Wallace-style (square root): t = 1.485 × √(W ÷ HP). Hale (scaled from quarter-mile): t = 5.825 × ∛(W ÷ HP) × 0.485. Fox (scaled from quarter-mile, real-world corrected): t = 6.269 × ∛(W ÷ HP) × 0.485. Use wheel HP, not flywheel HP — or let this calculator subtract drivetrain losses for you.

How much HP do I need for a 5-second 0-60?

Using the Wallace-style formula: HP = W × (1.485 ÷ t)². For a 5-second 0-60 in a 3,400 lb car, that's HP = 3,400 × (1.485 ÷ 5)² ≈ 300 wheel HP, or about 350 crank HP through a manual transmission. Switch to Find Required HP mode and enter your target time — the calculator returns both the wheel and crank power needed for any 0-60 target, with all three formulas compared.

How is G-force from 0-60 calculated?

Average G-force during a 0-60 run is the change in velocity divided by the time and gravitational acceleration: g = 26.82 ÷ (t × 9.80665), where 26.82 m/s is 60 mph in metric. A 3-second 0-60 averages ~0.91 g — roughly equivalent to a fighter jet takeoff. A 6-second 0-60 averages ~0.46 g. Peak G-force at launch is typically 1.3-1.8× the average, limited mostly by tire grip.

0-60 Calculator

Vehicle Weight (lbs)

Include driver weight (~170 lbs / 77 kg)

Engine Power (hp)

Power Measurement

Formula

All three formulas are shown in the comparison table

Estimated 0-60 mph Time

5.00sec

Using 300 whp at the wheels

Real-world times vary with traction, gearing, tire grip, launch technique, weather, and rollout convention.

Performance Breakdown

Sports Car / Tuned

Avg G-Force

0.55g

Weight / Power

11.3lb/hp

Distance to 60

220ft

Est. 1/4 Mile ET

13.08sec

Formula Comparison

Side-by-side 0-60 results from all three equations

Formula	0-60 Time (sec)
Wallace ✓	5.00
Hale	6.35
Fox	6.83

Wallace is the most-cited 0-60 formula. Hale and Fox are quarter-mile equations scaled to 0-60 by the empirical 0.485 ratio.

What Is the 0-60 Calculator?

Estimate 0 to 60 mph time from horsepower and weight

The 0-60 calculator estimates how long a vehicle takes to accelerate from a standing start to 60 mph (97 km/h). 0 to 60 is the most universally recognized acceleration benchmark — manufacturers, magazines, and enthusiasts all use it to compare cars, motorcycles, and EVs.

This tool combines three industry-standard formulas, drivetrain efficiency correction, and a built-in quarter-mile cross-conversion so you get a more honest answer than single-formula calculators.

Estimate 0-60 Time

Enter weight and horsepower to predict 0-60 mph time, average G-force, distance covered, and an estimated quarter-mile ET.

Find Required HP

Enter your weight and a target 0-60 time to find out exactly how much wheel and crank horsepower you need.

1/4 Mile → 0-60

Convert a known quarter-mile ET into an estimated 0-60 time using the empirical 0.485 ratio.

How to Calculate 0-60 From HP and Weight

Step-by-step worked example using the Wallace formula

The most common way to estimate a vehicle's 0-60 mph time from horsepower and weight uses the Wallace square-root formula. Here's how it works with a real-world example.

Example: 3,400 lb car with 300 wheel HP

Step 1: Divide weight by horsepower

3,400 ÷ 300 = 11.33

Step 2: Take the square root

√11.33 = 3.367

Step 3: Multiply by the Wallace constant

t = 1.485 × 3.367 = 5.00 seconds

This falls in the expected range for a ~300 WHP sport coupe of this weight class, such as a V8-powered pony car or turbocharged sport sedan. If you only have the manufacturer's crank (flywheel) horsepower rating, use the Flywheel power measurement option and select your drivetrain type — the calculator will automatically apply the correct drivetrain loss (typically ~15% for manual, ~22% for automatic) before running the formula.

0-60 Formulas Explained

Three industry-standard equations with different assumptions

The Wallace formula is the de-facto standard for 0-60 mph estimation. The Hale and Fox formulas were originally designed for quarter-mile times — this calculator scales them to 0-60 using the empirical 0.485 ratio that holds across most modern street and sport cars.

Wallace

Industry Standard

t = 1.485 × √(W ÷ HP)

Square-root formula calibrated against real-world drag-strip data. Gives reliable 0-60 estimates for street and sport cars in the 3-8 second range using wheel horsepower.

Hale (scaled)

Theoretical

t = 5.825 × ∛(W ÷ HP) × 0.485

Patrick Hale's quarter-mile formula scaled by an empirical 0.485 ratio. Gives an optimistic estimate that assumes ideal traction and minimal drivetrain loss.

Fox (scaled)

Real-World

t = 6.269 × ∛(W ÷ HP) × 0.485

Geoffrey Fox's quarter-mile formula scaled by 0.485. More conservative — typical drivetrain friction and aerodynamic drag are reflected in the constant.

0-60 to Quarter-Mile Relationship

0-60 time ≈ Quarter-mile ET × 0.485

An empirical ratio derived from drag-strip data across hundreds of street and sport cars. Use the Quarter Mile Calculator for the reverse direction.

Wheel HP vs Flywheel HP

The single biggest source of error in DIY 0-60 calculations

Manufacturers publish flywheel (or crank) horsepower — the power the engine produces before any drivetrain losses. By the time that power reaches the wheels, you've lost 5–25% of it to friction in the transmission, driveshaft, differential, and axles.

Manual

~15%

Typical loss for a healthy manual transmission with a stock clutch.

Automatic

~22%

Torque-converter automatics consume more power, especially before lockup.

Direct / EV

~5%

Single-speed direct-drive (most EVs) loses very little to drivetrain friction.

If you're using a manufacturer's HP figure, set Power Measurement to Flywheel and pick your drivetrain so the calculator applies the loss for you.

Why Real-World 0-60 Times Vary

What the formula can't see

Traction & Launch

Tire grip, AWD vs RWD, and launch technique are responsible for nearly all of the variance below 5 seconds. AWD cars consistently beat the formula's prediction; RWD cars often miss it.

Drivetrain Losses

This calculator uses ~15% loss for manuals, ~22% for automatics, and ~5% for direct-drive EVs. Actual loss varies by transmission type, gear ratios, and condition.

Vehicle Weight

Weight includes the car, driver, fuel, and any cargo. Reducing weight improves 0-60 time proportionally — even modest weight reduction yields a small but measurable improvement.

Power Curve Shape

Two engines with the same peak HP can produce different 0-60 times if one makes power earlier in the rev range. The formulas assume constant power, which favors broad-torque engines.

Shift Speed & Gearing

Most cars hit 60 mph in second gear. Cars that need a 1-2 shift to reach 60 lose a small amount of time to the shift versus those that don't. EVs avoid this entirely with single-speed transmissions.

Rolling vs Standing Start

Some manufacturers quote 0-60 with a 1-foot rollout (drag-strip convention), which can produce a slightly quicker time than a true standing start. This calculator estimates standing-start figures.

Frequently Asked Questions

Common questions about 0-60 mph times and acceleration

The most popular shortcut is a square-root formula: t = 1.485 × √(Weight ÷ HP), where weight is in pounds and HP is wheel horsepower. For example, a 3,400 lb car with 300 wheel HP: t = 1.485 × √(3,400 ÷ 300) = 1.485 × 3.367 ≈ 5.00 seconds — a typical result for a V8 pony car or turbocharged sport sedan in this weight and power class. Cube-root formulas like Hale and Fox (scaled from quarter-mile equations by 0.485) give a similar answer with slightly different assumptions about drivetrain loss and aerodynamic drag. If you only have the manufacturer's crank HP figure, use the Flywheel power measurement option so the calculator subtracts drivetrain loss for you.

0-60 times are measured using GPS-based timing equipment or a fifth-wheel sensor attached to the car. The clock starts when the vehicle first moves and stops when a calibrated GPS unit registers 60 mph. Many manufacturers and magazines subtract a 1-foot rollout before starting the clock — this is a drag-strip convention that can shave a small amount off the standing-start time. Some outlets publish both the standing-start time and the rollout-corrected time. Weather, altitude, and road surface also affect results, which is why the same car can show noticeable differences across different tests.

Once you know the wheel horsepower and vehicle weight, plug them into the Wallace formula: t = 1.485 × √(Weight ÷ Wheel HP). This gives a standing-start 0-60 mph estimate in seconds. This calculator also supports two cube-root alternatives — Hale and Fox — scaled from quarter-mile drag racing equations. You can also work backwards: if you know your target 0-60 time and vehicle weight, switch to Find Required HP mode and the calculator tells you exactly how much wheel and crank horsepower you need.

Physics-based 0-60 calculators that use the square-root or cube-root formulas can give reasonable ballpark estimates for street cars in the 5–9 second range, provided correct wheel horsepower and total vehicle weight are entered. Accuracy degrades for very fast cars (sub-4 seconds) where launch traction, tire compound, and surface prep dominate, and for very slow vehicles where aerodynamic drag becomes a bigger factor. High-performance EVs with advanced launch-control software routinely beat the formula by a significant margin. The most common source of error is entering flywheel HP without accounting for drivetrain loss — always use wheel HP or set the power measurement to Flywheel with the correct drivetrain selected.

The constant-power assumption works reasonably well for mid-power, single-motor EVs that aren't heavily traction-limited. However, it breaks down for high-performance AWD EVs with sophisticated launch control. These vehicles deliver near-peak torque from zero RPM, use launch-control algorithms that modulate torque hundreds of times per second to stay at the edge of tire grip, and employ multi-speed or multi-motor torque vectoring — none of which a simple weight-to-power formula can capture. Expect predictions to be noticeably slower than what these cars actually achieve. For realistic EV estimates, use the Direct Drive drivetrain option (~5% loss) and treat the result as a conservative upper bound.

Multiply the quarter-mile elapsed time (ET) by approximately 0.485. For example, a 13-second quarter-mile ET converts to roughly 0-60 in 6.3 seconds. The 0.485 multiplier is empirically derived from drag-strip data across hundreds of street and sport cars. It works best for cars in the 11–16 second ET range; very fast cars (sub-10s) tend to have a slightly lower ratio because they spend more of the quarter at high speed.

Under 3 seconds is hypercar territory (Top Fuel dragsters, million-dollar hypercars). 3–5 seconds is supercar / serious sport car (track-focused coupes and high-performance sedans). 5–7 seconds is hot-hatch / performance daily (hot hatches, sport compacts, base V8 coupes). 7–9 seconds is a typical modern sedan. 9–12 seconds is economy or base trim. Over 12 seconds usually means a heavy or low-power vehicle.

Drivetrain affects 0-60 in two ways. First, it determines how much engine power reaches the wheels: manual transmissions lose ~15%, automatics ~22%, and direct-drive EVs only ~5%. Second, the layout (FWD/RWD/AWD) affects launch traction. AWD cars consistently beat formula predictions below 5 seconds because they can put more power down off the line; powerful RWD cars often miss the predicted time due to wheelspin. Set Power Measurement to Flywheel and pick your transmission to apply drivetrain losses automatically.

Flywheel (or crank) horsepower is the engine output measured at the crankshaft, before any drivetrain losses. This is the figure manufacturers publish. Wheel horsepower (WHP) is what's left after the transmission, driveshaft, differential, and axles take their share — typically 15-22% less. For accurate 0-60 estimates, use wheel HP if you have a dyno number; if you only have the manufacturer's spec, choose Flywheel and let the calculator subtract the loss for you.

Different calculators use different formulas, different drivetrain-loss assumptions, and different rounding. Some use Wallace's square-root formula; others scale from quarter-mile cube-root formulas; some quote rolling-start (drag-strip) times that shave a small amount off standing-start figures. This calculator shows results from three formulas side-by-side so you can see the spread instead of trusting a single number.

Yes, with caveats. Motorcycles: use the Direct Drive option (~5% loss) since chain drives are very efficient — but the formulas tend to over-predict because bikes are launch-traction limited at this power-to-weight ratio. Real motorcycle 0-60 times are usually noticeably slower than predicted. EVs: pick Direct Drive (single-speed gearbox) and use the manufacturer's HP figure as Flywheel. Mid-power commuter EVs that aren't traction-limited tend to match the formula reasonably well, but launch-optimized AWD EVs with advanced launch control can beat the formula by a wide margin — these cars are limited by tire grip, not power-to-weight, and use launch-control software the simple model doesn't capture.

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Last updated Jun 12, 2026