# Stopwatch Calculator

5.0
8 reviews
100+
Everyone

Calculator for stopwatch arithmetic. Add, subtract, multiply, and divide race times without converting to seconds. Perfect for swimming and running / track / cross county. Intended for coaches, parents, and athletes.

Times are in HH:mm:ss.hh format (hours, minutes, seconds, hundredths). There is no need to type the colon or period, so "12345" is interpreted as "1:23.45" and ":30" is interpreted as "30.00".

Examples:

1. Calculating splits. Leg 4 started at 3:14.67 and ended at 4:11.50. What was leg 4's split?

4 1 1 5 0 - 3 1 4 6 7 = 56.83

2. Calculating pace. Runner A finished the marathon in 3:26:54.48. What was her mile pace?

3 2 6 5 4 4 8 ÷ 2 6 . 2 = 7:53.83

3. Calculating set duration. How long will 20 50s on :55 take to swim in practice?

: 5 5 × 2 0 = 18:20.00

4. Calculating relay seed times. The four runners' individual times are 54.68, 57.32, 57.98, and 1:00.04. What would their relay time be?

5 4 6 8 + 5 7 3 2 + 5 7 9 8 + 1 0 0 0 4 = 3:50.02

5. Converting between courses. Swimmer A swam a 5:44.86 short course yards 400 IM. What is that in meters? (1 yard = 0.9144 meters)

5 4 4 8 6 × . 9 1 4 4 = 5:15.33
Updated on
Feb 25, 2024

## Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
No data collected

## Ratings and reviews

5.0
7 reviews
Bill Haney
December 7, 2022
Does exactly what it's supposed to.
1 person found this review helpful