- Construction Calculator
- Automotive Calculator
- Networking Calculator
- Technology Calculator
- Cloud Services Calculator
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Screen Size from Diagonal CalculatorConvert a TV or monitor diagonal size and aspect ratio into real screen width, height and area. Supports 16:9, 21:9, 4:3 and any custom ratio.
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Password Entropy CalculatorCalculate password entropy in bits from length and character set. Estimate how strong and hard to crack your password is using log2 of the charset size.
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Video Bitrate Calculator from Target File SizeCalculate the video bitrate needed to fit a clip into a target file size. Enter MB and duration to get kbps, with optional audio bitrate subtraction.
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Cloud Cost Savings Percentage CalculatorCalculate the percentage you save on cloud costs after optimization. Enter your old and new monthly bills to see savings percentage and annual total.
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Amdahl's Law Speedup CalculatorCalculate theoretical speedup with Amdahl's Law. Enter the parallel fraction and processor count to find overall speedup, max speedup, and efficiency.
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Cloud Data Egress Cost CalculatorEstimate cloud data egress (outbound transfer) charges. Enter GB transferred, free tier, and price per GB to see your billable data and total cost.
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Horsepower from Quarter-Mile CalculatorEstimate engine horsepower from quarter-mile trap speed and vehicle weight using the Hale/Fox formula HP = weight × (mph/234)³. Free and instant.
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Network Latency from Distance CalculatorEstimate one-way and round-trip network latency (RTT) from physical distance over fiber optic cable using the speed of light and a velocity factor.
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MPH to KPH ConverterConvert miles per hour (mph) to kilometers per hour (km/h) instantly. Accurate vehicle speed conversion using the exact 1.609344 factor.
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Tire Plus Sizing CalculatorCompare two tire sizes for plus sizing. Calculate overall diameter, circumference, and the percentage difference to keep your speedometer accurate.
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Towing Capacity CalculatorCalculate your maximum safe trailer weight by subtracting your loaded truck weight from the GCWR. Free, fast towing capacity calculator.
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Coolant Mix Ratio CalculatorCalculate how much antifreeze concentrate and water you need for any total coolant volume and desired concentration. Get exact liters and the mix ratio.
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Stopping Distance from Friction CalculatorCalculate the stopping distance of a sliding object from its speed and friction coefficient using d = v²/(2·μ·g). Includes deceleration and stop time.
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Carpet Area CalculatorCalculate how many square yards of carpet you need from room length and width in feet, with an optional waste allowance for cuts and seams.
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Tile Area CalculatorCalculate how many tiles you need for a floor or wall. Enter room and tile dimensions plus a wastage allowance to get the exact tile count.
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Roof Pitch Angle CalculatorConvert roof rise and run into pitch angle in degrees, slope percent, rise:12 pitch, and rafter multiplier. Free, instant roof slope calculator.
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Cubic Feet to Cubic Yards CalculatorConvert cubic feet (ft³) to cubic yards (yd³) instantly. Just divide by 27. Free, accurate volume converter for concrete, mulch, gravel and soil.
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Trench Volume CalculatorCalculate trench excavation volume in cubic yards, cubic feet and cubic meters from length, width and depth. Free, fast and accurate.
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EV Tax Credit Savings Calculator (US)Estimate your US federal EV tax credit (up to $7,500) and net vehicle cost after MSRP and income (MAGI) eligibility caps under the IRA.
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Qubit States CalculatorCalculate the number of quantum states 2^n that n qubits can represent. Free qubit states calculator showing the exponential power of quantum computing.
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Rectangular Concrete Slab Volume CalculatorCalculate how many cubic yards of concrete you need for a rectangular slab from its length, width, and thickness. Fast, accurate, and free.
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Paint Needed for a Rectangular Wall CalculatorCalculate how many gallons of paint you need for a rectangular wall from its length, height, coverage per gallon, and number of coats.
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Rectangle Gravel/Mulch Volume CalculatorCalculate how many cubic yards of gravel, mulch, sand or topsoil you need to fill a rectangular area at a given depth. Enter length, width and depth.
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Rectangular Lumber Board Feet CalculatorCalculate board feet of rectangular lumber from length, width and thickness in inches. Multiply by board count for total BF instantly.
