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Converters & Units Tools
920 free calculators, converters and checkers — built for SG, MY and the region, reviewed with current figures. No accounts, no paywalls.
All 11 ASEAN members, plus Hong Kong, Taiwan and mainland China · numbering-plan check
34 province-level codes · reads 6-digit codes by MCA's 2025 rules
18-digit ISO 7064 MOD 11-2 · region + birth + gender
Lakh / crore ↔ million / billion ↔ 万 / 亿
Date arithmetic + day of week
Days/months/years between dates
HKD → Traditional Chinese cheque format
HK Island 4 + Kowloon 5 + New Territories 9 · with codes
1-2 letter + 6 digit + check character · Mod 11 algorithm
Reiwa, Heisei, Shōwa, Taishō and Meiji dates to Gregorian and back — exact at every changeover
12-digit format + birth date + state code · browser-only
5-digit postcode → town and state from MCMC's official list, or the state range
Verifies the S/T/F/G/M check-letter algorithm · browser-only
6-digit postcode → postal district (D01-D28) from SingPost's sector list
6 special municipalities + 3 cities + 13 counties · with ID letter
1 letter + 9 digits · region, sex code, serial, check digit
HH:MM:SS arithmetic + decimal
NTD → Traditional capital cheque format
ISO 8601 + US week numbering
Business days with ASEAN holidays
Convert length, weight, temperature, area, volume and speed — instantly, free.
Convert times across ASEAN and global timezones — perfect for remote teams and international meetings.
Convert between KB, MB, GB, TB
Convert speed units instantly — km/h, mph, m/s, knots, Mach and more — with a live conversion table.
Convert data storage units
Calculate the area of any shape — rectangle, circle, triangle, trapezoid and more — with formulas shown.
Convert HEX, RGB, HSL, HSB colours