Garden & Outdoor
Free outdoor calculators: mulch and gravel for landscaping, fuel costs, gas mileage, tire sizes, horsepower, and weather conditions.
Mulch Calculator
Calculate how much mulch you need for your garden or landscaping project. Get volume in cubic yards and bags needed.
Gravel Calculator
Calculate gravel needed for driveways, walkways, and landscaping. Get volume in cubic yards and tons.
Fuel Cost Calculator
Calculate fuel costs for trips based on distance, fuel efficiency, and gas prices.
Gas Mileage Calculator
Calculate your vehicle's fuel efficiency (MPG) based on distance traveled and fuel used.
Mileage Reimbursement Calculator
Calculate mileage reimbursement for business travel based on IRS rates.
Tire Size Calculator
Calculate tire dimensions, compare sizes, and see speedometer differences when changing tire sizes.
Horsepower Calculator
Calculate engine horsepower using torque and RPM, drag racing results, or vehicle weight.
Engine Horsepower Estimator
Estimate engine horsepower based on displacement, engine type, and configuration.
Wind Chill Calculator
Calculate the wind chill temperature and frostbite risk based on temperature and wind speed.
Heat Index Calculator
Calculate the heat index (feels like temperature) based on temperature and humidity.
Landscaping & Materials
Calculate exactly how much mulch or gravel you need for your landscaping projects. Get accurate estimates in cubic yards, tons, and bags to plan your purchases.
Automotive
Fuel cost, mileage and tire calculators.
Weather Conditions
Calculate wind chill and heat index to understand how weather really feels. Know the risks and take appropriate precautions for outdoor activities.