Four free judo tools covering match scoring, weight class lookup, technique reference, and calorie burn. Suitable for competitors, coaches, and recreational practitioners.
Understanding judo scoring
Modern judo (IJF rules since 2010) uses a simplified scoring system: ippon (full point — ends the match) is awarded for a perfect throw, a 10-second hold-down, or a submission. Waza-ari (half point) is awarded for throws that score but do not fully meet ippon criteria — two waza-ari equal one ippon and end the match. There is no longer a yuko score. Golden score (unlimited overtime) is used if scores are level at the end of regulation.
All judo tools
4Judo Match Score Tracker
Track a judo match with ippon, waza-ari and penalty (shido) scoring.
Open toolJudo Weight Class Finder
Find your Olympic judo weight category.
Open toolJudo Calorie Calculator
Estimate calories burned practising judo by intensity and bodyweight.
Open toolJudo Throws & Techniques Guide
Understand the main categories of judo techniques, from throws to groundwork.
Open toolFrequently asked questions
What weight classes are used in Olympic judo?
Olympic judo uses seven weight categories for both men and women. Men's: under 60kg, 66kg, 73kg, 81kg, 90kg, 100kg, and over 100kg. Women's: under 48kg, 52kg, 57kg, 63kg, 70kg, 78kg, and over 78kg. These are the IJF competition categories — some national federations use additional weight classes at lower levels.
What is the difference between ippon and waza-ari in judo?
Ippon is the maximum score and immediately ends the contest — it is awarded for a perfect throw that lands the opponent cleanly on their back with speed and force, a hold-down of 10 seconds or more, or a submission. Waza-ari is a half-point for a near-perfect throw or a hold-down of 5–9 seconds. Two waza-ari accumulate to ippon and end the match.
How are judo competitions structured?
Most judo competitions use a single or double elimination format within weight categories. Each bout is typically 4 minutes for adults (3 minutes for juniors), with golden score (sudden death overtime) if scores are level. The player leading on waza-ari wins if time expires without an ippon. In golden score, the first score of any kind wins.