happytails.ai

Cycling cadence calculator

Open Cycling cadence calculator on Happytails.ai. This view has the same page content and links, with explicit tool capabilities. Read the processing notes before using a tool.

Tool capabilities

{
  "id": "cycling-cadence-calculator",
  "category": "calculators",
  "built": true,
  "requirements": "Use whole tooth counts from 1 to 1000, rolling circumference from 100 to 10000 mm and speed from 0 to 2000 in the selected unit. Decimal inputs allow up to six places. These are software bounds, not vehicle capability claims. Results use floating-point arithmetic. Processing stays on your device, with a bounded worker and a 10-second timeout. Full JSON and CSV preserve every calculated row and the assumptions. Do not use thousands separators.",
  "implementation": {
    "fields": [
      {
        "key": "chainring",
        "label": "Chainring teeth",
        "value": 50,
        "type": "text",
        "inputMode": "numeric",
        "maxLength": 24
      },
      {
        "key": "sprocket",
        "label": "Sprocket teeth",
        "value": 25,
        "type": "text",
        "inputMode": "numeric",
        "maxLength": 24
      },
      {
        "key": "circumferenceMm",
        "label": "Rolling wheel circumference (mm)",
        "value": "2100",
        "type": "text",
        "inputMode": "decimal",
        "maxLength": 24
      },
      {
        "key": "speed",
        "label": "Road speed",
        "value": "15.12",
        "type": "text",
        "inputMode": "decimal",
        "maxLength": 24
      },
      {
        "key": "speedUnit",
        "label": "Speed unit",
        "value": "km/h",
        "type": "select",
        "values": [
          "km/h",
          "mph"
        ],
        "labels": {
          "km/h": "Kilometers per hour",
          "mph": "Miles per hour"
        }
      }
    ],
    "input": false,
    "presentation": "metrics",
    "note": "Use measured rolling wheel circumference from 100 to 10000 mm and whole tooth counts from 1 to 1000. Enter road speed from 0 to 2000 in the selected unit. This calculates cadence for steady selected gearing without tire slip. It does not prescribe a safe or comfortable cadence. Do not use thousands separators.",
    "experience": {
      "automatic": false,
      "single": false,
      "inputMaxLength": 1000000,
      "inputMode": "text",
      "label": "Your text",
      "placeholder": "Type or paste your input…",
      "help": "Up to 1,000,000 characters. Review the settings before running.",
      "helpParts": [
        "Up to 1,000,000 characters.",
        "Review the settings before running."
      ],
      "action": null
    },
    "mode": "explicit",
    "interactive": false
  },
  "execution": "Browser interface",
  "api": null,
  "browser_agent": {
    "supported": true,
    "name": "run_current_tool",
    "discovery": "WebMCP on the human page in a supporting browser",
    "verification": "See audit/API-AUDIT.md; availability is not verification"
  }
}

Page guide

Calculate your pedaling cadence from road speed, wheel circumference and selected bicycle gearing.

How to use Cycling cadence calculator
  1. Enter the selected chainring and sprocket tooth counts.
  2. Enter rolling wheel circumference, road speed and its unit.
  3. Calculate cadence and wheel speed. Download the complete report.

Useful next steps

Convert road speed into pedal revolutions

Cadence in RPM is speed in meters per second multiplied by 60, divided by development in meters per crank revolution. Zero road speed produces zero cadence.

Keep gearing and measurements consistent

Use the actual tooth counts for the selected gear and a measured rolling circumference. This kinematic calculation assumes no tire slip. It does not recommend an ideal cadence or simulate power and road resistance.