BMI Calculator
Calculates BMI from weight and height, with a basic reference category for body status.
Content hub · 18 tools
Calculators
Small calculators for dates, finance, basic wellness, ratios, bandwidth, and common conversions.
Quick calculations for common numbers
The Calculators group collects small tasks you often need: percentages, workdays, aspect ratios, bandwidth, SLA, loans, and salary-related values.
Use this group when
- Quickly calculate dates, ratios, percentages, and unit conversions.
- Estimate bandwidth, SLA, loans, or salary values.
- Get simple numbers without opening a spreadsheet.
Tool list
Sleep Calculator
Suggests bedtime or wake-up time based on approximate 90-minute sleep cycles.
Date Calculator
Calculates the difference between two dates or adds and subtracts days from a date.
Workday Calculator
Adds, subtracts, or counts business days while excluding weekends and custom holidays.
Percentage Calculator
Calculates percent of a number, ratios between values, and percentage increase or decrease.
Currency Converter
Converts currencies using a public exchange-rate API for quick value estimates.
Aspect Ratio Calculator
Calculates aspect ratios and matching dimensions for images, videos, or layouts.
Data Transfer Calculator
Estimates download or upload time from data size, network speed, and overhead.
Bandwidth Calculator
Estimates average bandwidth, active-hour bandwidth, and daily or monthly traffic volume.
Uptime / SLA Calculator
Calculates allowed downtime from an SLA and compares it with actual outage duration.
Loan / Mortgage Calculator
Estimates installment payments, total interest, and early principal/interest schedule for a loan.
Compound Interest Calculator
Calculates compound growth from initial amount, recurring contributions, annual return, and duration.
Unit Converter
Converts common units such as length, weight, temperature, and data size.
Salary Calculator
Estimates net salary from gross salary with insurance, deductions, and a basic personal income tax model.
Age Calculator
Calculates age in years, months, and days, plus days remaining until the next birthday.
Time Zone Converter
Converts a time between common time zones and provides the matching UTC or Unix timestamp.
Calorie / TDEE Calculator
Estimates BMR, TDEE, target calories, and reference protein needs from basic body data.
Tip / Split Bill Calculator
Calculates tip, tax or fees, total payment, and per-person amount when splitting a bill.
Frequently asked questions
Do these calculators replace professional advice?
No. They are for quick reference; financial, medical, or legal decisions still need appropriate professional sources.
