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US Sales Tax CalculatorCalculate US sales tax and final price from a pretax amount and a rate you enter. No automatic state, city or jurisdiction lookup.Open tool →Tip Calculator and Split BillCalculate restaurant tips, split a bill among friends and add optional taxes or charges without a login.Open tool →Electricity Cost Calculator (kWh)Estimate electricity use in kWh and cost from watts, daily usage hours, days and your rate per kWh. Free online calculator.Open tool →Aspect Ratio CalculatorCalculate image aspect ratio and proportional height for a target width. Supports 16:9, 4:3, 1:1 and custom sizes.Open tool →Percentage Calculator OnlineCalculate percentages, changes and proportions in seconds.Open tool →UK VAT Calculator — Add or Remove VATCalculate VAT on net and gross amounts using common UK rates.Open tool →Days Between Dates CalculatorFind the number of calendar days between two dates.Open tool →Work Hours CalculatorCalculate net working time, breaks and overnight shifts.Open tool →Discount CalculatorFind your final price and savings, including stacked discounts.Open tool →EAN-13 Barcode GeneratorCreate and download free EAN-13 barcodes as SVG files.Open tool →Business Days CalculatorCount Monday-to-Friday working days, with optional holiday exclusions.Open tool →Profit Margin & Markup CalculatorCalculate profit, margin and markup from cost and selling price.Open tool →Break Even CalculatorFind break-even units and revenue from fixed costs, variable costs and unit price.Open tool →Unit Price CalculatorCompare two product packages and see price per unit and savings.Open tool →Compound Interest CalculatorEstimate monthly contributions, future value and illustrative interest.Open tool →Weighted Average CalculatorCalculate the weighted mean from values and weights.Open tool →Word and Character CounterCount words, characters, non-spaces and lines instantly.Open tool →Square Metres CalculatorFind rectangular area, perimeter and square feet.Open tool →Inches to Centimetres and Feet ConverterConvert inches, centimetres and feet plus inches with precise browser-based calculations.Open tool →Cubic Metres and Litres CalculatorCalculate cubic metres, litres and cubic feet using length, width and height.Open tool →ROI Calculator: Return on InvestmentFind return on investment, profit or loss using starting cost and total returns.Open tool →Age Calculator: Years, Months and DaysCalculate chronological age in years, months and days and find your next birthday.Open tool →US Gas Cost CalculatorEstimate road trip cost from miles, US MPG and dollars per US gallon.Open tool →
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