Calculators & Converters
7 tools
Unit, age, EMI, percentage, file size, time zone, and timestamp tools.
Unit Converter
Convert units across length, mass, temperature, area, volume, speed, and more.
Age Calculator
Calculate exact age in years, months, and days from any birth date.
EMI Calculator
Estimate monthly loan EMI with a full amortization schedule and interest breakdown.
Percentage Calculator
Run quick percentage math: X% of Y, % change between values, add/subtract percentages.
File Size Converter
Convert between bytes, KB, MB, GB, and TB in binary or decimal units.
Time Zone Converter
Convert times across world time zones with DST-aware calculations.
Unix Timestamp Converter
Convert Unix timestamps to human-readable dates and back, in seconds or ms.
About Calculators & Converters
Calculators & Converters covers seven numerical utilities — a multi-category unit converter, age calculator, EMI/loan calculator with amortization schedule, percentage calculator (four modes), file size converter, world time zone converter, and Unix timestamp converter. Each tool uses high-quality math (Intl APIs for time and currency, the standard EMI formula with floating-point care, and a complete unit table covering length, mass, temperature, area, volume, speed, time, data, and energy).
The EMI calculator includes a downloadable CSV amortization schedule and a principal-vs-interest pie chart. The time zone converter is DST-aware via the IANA time zone database that the browser ships with. Everything is precise enough for production work and presented clearly enough to share with non-technical stakeholders.
Frequently asked questions
Is the EMI formula correct for my country's mortgage?+
We use the standard reducing-balance EMI formula, which matches what Indian, US, UK, and most European fixed-rate mortgages use. Compare against your lender's amortization schedule to validate — you should match to within rounding.
How accurate is the time zone converter across DST changes?+
It uses Intl.DateTimeFormat, which is backed by the IANA time zone database. DST transitions, historical offsets, and rare cases like Lord Howe Island's half-hour DST are handled correctly.
What is the difference between KiB and kB in the file size converter?+
KiB (kibibyte) is exactly 1024 bytes; kB (kilobyte) in the SI system is 1000 bytes. The mode toggle switches between them. Hard drive manufacturers use kB/GB/TB; most operating systems display KiB/GiB/TiB but label them as KB/GB/TB, which is the source of the famous storage discrepancy.