Court Math — NTRP Rating Calculator

Step 1 · Choose formula

Dynamic rating formula

new rating = (match + current + prior₁ + prior₂) ÷ 4

Step 1 · Seed your rating history

Prior dynamic ratings (before your current rating) — from the Rating column on TennisRecord, most recent first

Step 2 · Log a match

Your rating
going into this match

Partner

Opponent 1

Opponent 2

Result

Score

Set 1–

Set 2–

Set 3/TB–

Match rating

—.—

Fill in the match details and tap Preview.

Dynamic rating

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2.53.03.54.04.55.0

Rating pool

Match log · tap to remove

No matches yet. Load your TR link or log a match.

Match rating (doubles):
mr = 0.50 × (opp1 + opp2 − partner) + 0.50 × your_rating + 0.57 × gd_pct

Match rating (singles):
mr = 0.50 × opp + 0.50 × your_rating + 0.13 × gd_pct

where gd_pct = (games_won − games_lost) / total_games

Dynamic rating — two modes:
Relaxed (÷4): (match + current + prior₁ + prior₂) ÷ 4 — each match carries 25% weight, reacts quickly to wins and losses
Conservative (÷5): (match + current + prior₁ + prior₂ + prior₃) ÷ 5 — each match carries 20% weight, dampens swings from single outlier matches