Calculators Tools & Calculators
Fast general-purpose calculators for percentages, age, calories, tips and other common everyday calculations.
Browse calculators toolsUse the directory below to compare related tools in one place. Each resource has its own focused page with task-specific instructions, assumptions, limitations and related links.
All calculators resources
6 tools and guides are currently grouped in this category.
Percentage Calculator
Calculate percentages, percentage change and one value as a percentage of another.
Tip Calculator
Calculate a tip, total bill, per-person cost and split gratuity between people.
Age Calculator
Calculate exact age in years, months and days plus total days and next birthday.
Calorie Counter
Estimate daily calorie needs, BMR and TDEE from age, body size and activity level, with maintenance and moderate goal targets.
Voltage Drop Calculator
Estimate conductor voltage drop, percentage loss and load voltage for copper or aluminum circuits.
Wire Size Calculator
Estimate a minimum AWG conductor size from voltage-drop criteria for copper or aluminum circuits.
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