Stopwatch Calculator

100+
Downloads
Content rating
Everyone
Screenshot image
Screenshot image

About this app

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
Mar 5, 2017

Data safety

Developers can show information here about how their app collects and uses your data. Learn more about data safety
No information available

What's new

This version is the same as the previous version except that it requires a later version of Android. As a result, it no longer requires you to grant unneeded permissions and it now displays correctly in landscape mode. It also seems to have changed the colors of the buttons on some devices.