Everyday Math Essentials
Cover quick calculations for percentages, fractions, averages, and ratios used in school, shopping, and spreadsheets.
🔢 Rounding Calculator
Round numbers to nearest integer, decimal places, or significant figures
About Rounding
Rounding simplifies numbers while maintaining approximate value. Different methods serve different purposes.
Rounding Methods
- Nearest Integer: Rounds to whole number (123.5 → 124)
- Decimal Places: Rounds to specific decimal position (123.456 → 123.46 for 2 places)
- Significant Figures: Rounds to specific number of significant digits (123.456 → 123 for 3 sig figs)
Frequently Asked Questions
What is the 0.5 rule?
Numbers ending in exactly 0.5 round up (2.5 → 3). This is the standard rounding rule.
When to use significant figures?
Use significant figures in scientific calculations to maintain precision appropriate to measurement accuracy.
🧭 Guided Journeys
Use a workflow instead of stopping at one result
These grouped paths are designed to help you continue with the most common follow-up calculations in this category.
Algebra & Equations
Move from powers and logarithms into more advanced solving tools when the problem gets more complex.
Geometry & Measurement
Calculate dimensions, area, and triangle relationships using a connected geometry workflow.