Calculator categories
All Calculator Categories
Choose a category and find practical tools for everyday calculations. Each calculator includes a simple formula, examples and related tools.
18 tools
Manage discounts, percentages, VAT, savings, budgets and everyday money calculations.
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13 tools
Estimate electricity cost, appliance usage and common home utility bills.
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9 tools
Calculate fuel consumption, trip fuel cost, mileage and practical car expenses.
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11 tools
Estimate download time, data usage, file sizes and internet speed conversions.
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11 tools
Calculate date differences, work hours, durations and time-related values.
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8 tools
Simple calculators for profit, markup, ROI, VAT and small business planning.
Open category →How to use the categories
Start with the category closest to your question. Money tools cover discounts, percentages, budgets and interest. Home tools estimate household usage and utility costs. Car tools focus on fuel, mileage and travel estimates. Tech tools help with internet speed, downloads and storage.
Every calculator page is designed to be used directly, but it also explains the formula behind the result so you can understand the calculation instead of only copying the answer.