Transportation Calculators
A mix of gearhead performance math and everyday commuting calculations sits in this subcategory: 0-60 acceleration time, boost horsepower, compression ratio, fuel-specific consumption, drive time, commute cost, and carpooling savings.
Calculators & Tools
0-60 Calculator
The 0-60 Calculator estimates the time a vehicle takes to accelerate from 0 to 60 mph (0 to 96.6 km/h) using horsepower, vehicle weight, and drivetrain type. It applies the power-to-weight ratio formula alongside real-world drivetrain loss coefficients to produce an estimate close to track-tested results. Use it to compare acceleration potential between vehicles or evaluate the effect of weight reduction and engine upgrades.
Drive Time Calculator
The Drive Time Calculator estimates total trip duration from distance and average speed, adding planned stops and any extra delay to give a realistic total rather than pure driving time alone. Enter a departure time to see a projected arrival time as a clock time. Use it to plan a road trip or check whether a departure time leaves enough buffer for a fixed arrival deadline.
Speedometer Gear Calculator
The Speedometer Gear Calculator computes the driven gear tooth count needed on a mechanical speedometer cable (Driven Teeth = Drive Teeth x Axle Ratio x Tire Rev/Mile / 1,001) to stay accurate after a tire size or axle ratio change, and separately calculates the resulting speedometer error percentage and actual speed if that gear hasn't been swapped. Distinct from the RPM Calculator, which computes engine RPM at a given road speed rather than the physical replacement speedometer part.
Fuel Cost Calculator
The Fuel Cost Calculator works out trip fuel cost from distance, fuel economy, and price per gallon or liter, with a round-trip toggle and passenger split for carpooling. Its Compare Vehicles mode sets two fuel economy figures side by side, and its Gas vs EV mode compares gasoline cost against electric charging cost for the same distance, a comparison most fuel calculators skip entirely.
Boat Speed Calculator
The Boat Speed Calculator works out actual boat speed in knots, mph, and km/h from a distance and time you enter, and separately estimates the theoretical hull speed of a displacement-hull boat from its waterline length. It supports nautical miles, statute miles, and kilometres. Use it to check your average speed on a passage or to see the practical top speed a displacement hull can reach efficiently.
Gas Calculator
The Gas Calculator works out a recurring gas budget, weekly, monthly, and annual, from daily commute miles, days driven per week, fuel economy, and price per gallon, then converts monthly gallon usage into a fill-up count based on tank size. Its Price Sensitivity view shows how the monthly budget shifts across nearby gas price points, a planning feature most gas budget tools skip.
Boost Horsepower Calculator
The Boost Horsepower Calculator estimates how much horsepower a turbocharger or supercharger adds at a given boost pressure, starting from your engine's naturally aspirated baseline. It applies an adjustable efficiency factor to account for intercooling, heat, and tuning quality rather than assuming a perfect, lossless gain. Use it to sanity-check a boost target before committing to a turbo, injector, or fuel system upgrade.
BSFC Calculator
The BSFC Calculator solves for brake specific fuel consumption, fuel flow rate, or horsepower from the other two values, and separately sizes fuel injectors from a target horsepower, BSFC, cylinder count, and maximum duty cycle. It converts the result between lb/hr and cc/min automatically. Use it to size injectors correctly before a power upgrade rather than guessing at the next size up.
Flight Radiation Calculator
The Flight Radiation Calculator estimates cosmic ionizing radiation dose from a single flight or a full year of flying, based on route latitude and flight duration. It compares the result to X-ray equivalents and annual background radiation for a single flight, or to the general public and aircrew exposure limits for frequent flyers, giving actual numbers to a question most people only have a vague sense of.
Commute Calculator
The Commute Calculator adds up the full cost of a daily commute, fuel, vehicle wear and tear, parking, tolls, and an optional value for your time, then projects it across a week, month, and year. It also totals the hours and miles spent commuting annually. Use it to see the real cost of a commute before accepting a job offer or deciding whether to move closer to work.
GVWR Calculator
The GVWR Calculator works out remaining payload capacity from your vehicle's GVWR and curb weight, plus passengers, cargo, and trailer tongue weight, and includes an optional per-axle GAWR check using certified scale weights. Its separate Towing mode checks combined tow vehicle and trailer weight against GCWR, since GCWR is a distinct manufacturer rating, not simply GVWR plus trailer weight.
Speed Calculator
The Speed Calculator solves Speed = Distance / Time in any direction (find speed, distance, or time given the other two, in miles or kilometers), and separately computes the correct average speed for a round trip made at two different speeds for equal-distance legs using the harmonic mean, 2v1v2/(v1+v2), rather than a simple average. Distinct from the Velocity Calculator, which solves the fuller five-variable SUVAT kinematics relationship (including acceleration) for physics problems rather than everyday trip planning.
Compression Ratio Calculator
The Compression Ratio Calculator works out an engine's static compression ratio from bore, stroke, combustion chamber volume, head gasket dimensions, piston dish or dome, and deck clearance, or directly from swept and clearance volume if you already have those figures. It automates the same math engine builders use when planning a rebuild or verifying a spec sheet. Use it before ordering pistons or a head gasket to confirm the target compression ratio.
Carpooling Calculator
The Carpooling Calculator splits a round-trip fuel cost evenly across everyone sharing a ride, then projects weekly and annual savings compared with driving alone. It also estimates the CO2 emissions avoided based on the fuel not burned by the extra vehicles that stayed home. Use it to see the real dollar and environmental impact of a regular carpool arrangement.
Fuel Pump Calculator
The Fuel Pump Calculator works out required fuel flow in GPH and LPH from a target horsepower figure, using BSFC by aspiration and fuel type (gasoline, E85, methanol) plus a safety margin and pump count. Its Voltage & Pressure Correction mode adjusts a pump's rated flow for actual battery voltage and fuel rail pressure, a real-world check most fuel pump sizing tools skip entirely.
Crosswind Calculator
The Crosswind Calculator resolves wind speed and direction into a crosswind component and a headwind or tailwind component relative to a runway heading, using the same trigonometry taught for E6B flight computers. Enter runway heading, wind direction, and wind speed to see both components and whether the wind is coming from the left or right. Use it during pre-flight planning to check reported wind against a runway's usable direction.
Compression Ratio to PSI Calculator
The Compression Ratio to PSI Calculator estimates the cranking compression test pressure a given static compression ratio should produce, using the polytropic compression approximation. It shows both the theoretical figure and the realistic real-world range, since actual gauge readings typically run 10 to 20 percent below theory. Use it to sanity-check a compression test result against what your engine's compression ratio predicts.
Horsepower Calculator
The Horsepower Calculator works out engine power three ways: from torque and RPM using the standard dynamometer formula, from quarter-mile trap speed and vehicle weight using Hale's drag-racing formula, or by converting between wheel horsepower and crank horsepower for a given drivetrain. Use it to sanity-check a dyno sheet, estimate power from a time slip, or settle a WHP-versus-crank argument with the right formula instead of a rule of thumb.
Engine Hours to Miles Converter
The Engine Hours to Miles Converter estimates equivalent mileage from engine hours using different average-speed presets for highway trucks, fleet vehicles, and farm or heavy equipment, since each type wears differently per hour of running. A separate marine mode skips the miles conversion entirely and compares boat engine hours directly against typical expected-lifespan ranges, the metric mechanics and surveyors actually use.
Nautical Mile Calculator
The Nautical Mile Calculator converts nautical miles to statute miles, kilometers, and meters, converts knots to mph and km/h, and estimates voyage time by dividing distance in nautical miles by speed in knots. Built for marine and aviation navigation planning, distinct from generic distance converters that don't include the knots-to-voyage-time relationship.