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Running Pace CalculatorCalculate running pace, speed, and projected race time.Score 38runPace CalculatorCalculate running or walking pace from time and distance.Score 22runBattery Backup CalculatorEstimate battery runtime from capacity, voltage, load, efficiency, and depth of discharge.Score 22runRoof Pitch CalculatorCalculate roof pitch percentage and angle from rise and run.Score 14runVoltage Drop CalculatorEstimate voltage drop over cable length from current and conductor resistance.Score 12runStair CalculatorCalculate stair riser count, riser height, tread run, and total run.Score 12runScrap Rate CalculatorCalculate scrap rate, good units, and cost of scrap.Score 12runkWh CalculatorCalculate kilowatt-hours from watts and runtime.Score 4runGenerator Fuel CalculatorEstimate generator fuel use and cost from load, runtime, and fuel rate.Score 4runMachine Efficiency CalculatorCalculate machine efficiency from actual output, standard output, and runtime.Score 4runMortgage CalculatorEstimate monthly mortgage payments, total interest, principal, and payoff cost.Score 2BMI CalculatorCalculate body mass index using metric or imperial units and view the standard BMI category.Score 2Compound Interest CalculatorProject future investment value with compounding frequency and recurring contributions.Score 2Fuel Cost CalculatorEstimate advanced trip fuel cost with distance modes, efficiency units, fuel price units, emissions, commute projections, and vehicle comparisons.Score 2Scientific CalculatorUse a keyboard-friendly scientific calculator with trig, logs, powers, constants, and memory.Score 2Percentage CalculatorCalculate percentages, percent change, discounts, increases, and reverse percentages.Score 2Loan CalculatorEstimate loan payments, total interest, payoff totals, and amortized monthly costs.Score 2Force CalculatorCalculate force, mass, or acceleration using Newton's second law.Score 2Ohm's Law CalculatorCalculate voltage, current, resistance, and power from Ohm's law relationships.Score 2Age CalculatorCalculate exact age in years, months, days, total days, and next birthday countdown.Score 2