---
title: "Everyday Calculators | BQ Calculator"
canonical: "https://calculator.bqtools.com/everyday/"
description: "Quick, polished tools for scientific math, unit conversion, dates, percentages, totals, splits and daily decisions. Browse complete, fast and privacy-friendly tools from BQ Calculator."
---

# Everyday Calculators

Quick, polished tools for scientific math, unit conversion, dates, percentages, totals, splits and daily decisions.

### Tip Calculator & Bill Splitter

Calculate tax, tip, total bill and the amount each person owes.

### Percentage Calculator

Solve common percentage-of, percent-of-total and percentage-change calculations instantly.

### Scientific Calculator

Evaluate arithmetic and scientific expressions with trig, logs, roots, powers, constants, memory and keyboard input.

### Unit Converter

Convert length, mass, area, volume, speed, temperature, time and digital-storage units locally in your browser.

### Date Difference Calculator

Find the exact number of days, weeks and calendar years, months and days between two dates.

## About everyday calculators

Quick, polished tools for scientific math, unit conversion, dates, percentages, totals, splits and daily decisions. BQ Calculator publishes a page only when the calculator has functioning inputs, transparent logic, useful supporting content and a clear limitation statement.

## Machine-readable resources

- Calculator registry: https://calculator.bqtools.com/calculators.json
- Site index: https://calculator.bqtools.com/llms.txt
- Full agent text: https://calculator.bqtools.com/llms-full.txt
- Agent discovery index: https://calculator.bqtools.com/agent-index.json