- Fraction Calculator
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Sales Tax Backed Out of Total CalculatorBack out the sales tax from a tax-inclusive total. Enter the gross amount and tax rate to find the net price and the tax included.
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X-Intercept CalculatorFind the x-intercept of a line from its slope-intercept equation y = mx + b. Set y = 0 and solve x = −b/m with worked steps.
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Factor Out the GCF from a Polynomial CalculatorFactor out the greatest common factor (GCF) from any polynomial. Enter the terms and get the fully factored form with steps. Free and instant.
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Percent Grade to Degrees CalculatorConvert a percent grade (slope) into degrees instantly. Enter the grade % to get the slope angle in degrees and radians using arctangent.
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Target Heart Rate Zone Percentage CalculatorCalculate your target heart rate at any exercise intensity percentage using your age and the 220-minus-age maximum heart rate formula.
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Alcohol Proof to Percentage (ABV) CalculatorConvert US alcohol proof to percentage alcohol by volume (ABV) instantly. Just divide proof by 2 — enter the proof to get the exact ABV percentage.
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Stock Price Percent Gain/Loss CalculatorCalculate the percentage gain or loss on a stock from its buy and sell price. Get profit per share and total profit instantly. Free and universal.
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15 Percent Tip CalculatorCalculate a 15% tip and total bill instantly. Enter your bill amount, optionally split between people, and see the tip and total per person.
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20 Percent Off CalculatorCalculate 20% off any price instantly. Enter the original price to see the sale price and how much money you save with a 20 percent discount.
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50% Off CalculatorCalculate 50 percent off any price instantly. Enter the original price to see the half-off sale price and how much money you save.
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30 Percent Off CalculatorCalculate 30% off any price instantly. Enter the original price to see the discounted sale price and the exact amount you save.
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Win Rate CalculatorCalculate your win rate percentage from wins and games played. Free win rate calculator for esports, sports, gaming and matches with instant results.
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3D Vector Cross Product CalculatorCompute the cross product of two 3D vectors a × b instantly. Get each component (x, y, z) plus the magnitude of the resulting perpendicular vector.
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Number Base Converter CalculatorConvert numbers between binary, octal, decimal, and hexadecimal. Free base converter using place value and repeated division with worked steps.
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De Moivre's Theorem CalculatorApply De Moivre's theorem to raise a complex number in polar form (r∠θ) to a power n. Get modulus, angle, and rectangular a+bi form instantly.
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Grade Percentage Needed CalculatorFind the average score you need on the remaining work to hit your target final grade, based on your current grade and weight completed.
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Arithmetic Sequence CalculatorCompute the nth term (aₙ) and the sum (Sₙ) of an arithmetic sequence from the first term, common difference, and term position.
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Original Value Before Percent Change CalculatorFind the original value before a percent increase or decrease. Enter the final value and percent change to reverse-calculate the starting amount instantly.
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Percent Markup on Cost CalculatorCalculate percent markup on cost from your item cost and selling price. Instantly see markup %, profit per unit, and profit margin.
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How Much Percent Decrease CalculatorFind out how much percent a value decreased. Enter the original and new value to instantly calculate the percentage decrease and absolute change.
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Sales Tax Amount CalculatorCalculate the sales tax amount and total price from any price and tax rate. Enter the pre-tax price and percentage to see tax owed instantly.
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Find X and Y Intercepts of a LineFind the x-intercept and y-intercept of a line in standard form Ax + By = C. Enter A, B, and C to get both intercepts and the slope instantly.
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Gross Profit Percentage CalculatorCalculate gross profit percentage (margin) from revenue and cost of goods sold. Instantly see gross profit and margin % with this free calculator.
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Margin on Selling Price CalculatorCalculate gross margin as a percentage of selling price from cost and sale price. Also shows gross profit and markup on cost. Free and instant.
