Math & Numbers
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Percentage, area conversion, and number calculators
Percentage Calculator
Calculate percentages, percentage change, and percentage of a number
Pyeong Converter
Convert between Pyeong (평), square meters, and square feet for Korean real estate
Tsubo / Tatami Converter (坪畳変換)
Convert between Tsubo (坪), Tatami (畳), and square meters for Japanese real estate
GPA Converter (Korea)
Convert GPA between Korean university grading scales (4.5, 4.3, 4.0) with grade reference table
CSAT Grade Calculator (Korea)
Convert Korean CSAT (수능) percentile to 9-grade scale with cutoff reference table
Temperature Converter
Convert between Celsius, Fahrenheit, and Kelvin temperature scales
Length Converter
Convert between meters, feet, inches, centimeters, kilometers, and miles
Weight Converter
Convert between kilograms, pounds, ounces, grams, and stones
Speed Converter
Convert between km/h, mph, m/s, knots, and Mach number
Data Storage Converter
Convert between bytes, KB, MB, GB, TB, and PB with binary and decimal units
Number Base Converter
Convert numbers between binary, octal, decimal, and hexadecimal