Pace Calculator API

POST https://api.findutils.com/api/tools/pace-calculator/execute

Running pace calculator. Give any two of distance, finish time and pace, and it solves for the third, then projects 5K, 10K, half marathon and marathon times at that pace. Times accept mm:ss or h:mm:ss; pace is per kilometre or per mile.

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Request body

application/json

distance

number optional

Distance in the chosen unit. Needed unless solve_for is "distance".
time

string optional

Finish time as mm:ss or h:mm:ss. Needed unless solve_for is "time".
pace

string optional

Pace per unit as mm:ss. Needed unless solve_for is "pace".
unit

string optional

Distance unit for both the distance and the pace. One of km · mi. Default "km".
solve_for

string optional

Which value to compute from the other two. One of pace · time · distance. Default "pace".

Example arguments

Verified

{
  "distance": 10,
  "time": "50:00",
  "unit": "km",
  "solve_for": "pace"
}

curl -X POST https://api.findutils.com/api/tools/pace-calculator/execute \
  -H "Content-Type: application/json" \
  -d '{
    "distance": 10,
    "time": "50:00",
    "unit": "km",
    "solve_for": "pace"
  }'

const response = await fetch('https://api.findutils.com/api/tools/pace-calculator/execute', {
  method: 'POST',
  headers: { 'Content-Type': 'application/json' },
  body: JSON.stringify({"distance":10,"time":"50:00","unit":"km","solve_for":"pace"}),
});
const data = await response.json();

import requests

response = requests.post(
    "https://api.findutils.com/api/tools/pace-calculator/execute",
    json={"distance":10,"time":"50:00","unit":"km","solve_for":"pace"},
)
data = response.json()

$ch = curl_init('https://api.findutils.com/api/tools/pace-calculator/execute');
curl_setopt_array($ch, [
    CURLOPT_POST => true,
    CURLOPT_HTTPHEADER => ['Content-Type: application/json'],
    CURLOPT_POSTFIELDS => '{"distance":10,"time":"50:00","unit":"km","solve_for":"pace"}',
    CURLOPT_RETURNTRANSFER => true,
]);
$data = json_decode(curl_exec($ch), true);

Also an MCP tool

Call pace_calculator from Claude, Cursor or any MCP client. Same arguments, same output.

https://mcp.findutils.com

MCP reference

Rate limit: 60 a minute, per IP
Auth: None
REST id: pace-calculator
MCP name: pace_calculator
Category: Calculators
Machine-readable: openapi.json · markdown.md

Request body

Example arguments

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