ForHosting KIT · Developer Utilities

Warsaw method calculator

The Warsaw method, also called the Pańkowska or Warsaw School insulin-pump protocol, estimates a mealtime insulin dose from carbohydrate grams together with the delayed glucose effect of fat and protein.

● BetaFree · in your browser

Run — free How it works & API

Use it from WebAPIEmailTelegramApp soon

One carbohydrate unit is ten grams of carbohydrate. One fat-protein unit (FPU) is one hundred kilocalories from fat plus protein, using nine kilocalories per gram of fat and four per gram of protein. Immediate insulin covers carbohydrate with your insulin-to-carb ratio. Extended insulin covers each FPU as if it equalled ten grams of carbohydrate, typically as a square or dual-wave bolus. This calculator is a deterministic educational worksheet: it does not diagnose, prescribe, or replace a clinician. Negative nutrient amounts are rejected. The browser widget is free; successful API calls bill at $0.002.

How to use it

Enter your values in the form above. The tool checks them before calculating and shows the result on the same page.

Check your inputs

Use the labels and units shown next to each field. If something is missing or outside the allowed range, the page points to the field to fix.

Use it again or automate it

Use the browser tool for individual checks and the API when you need the same capability in an automated workflow.

What you can do with it

Get an answer now

Enter one set of values and see the result without building a spreadsheet or script.

Compare scenarios

Change one value at a time and rerun the calculation to understand what affects the result.

Automate repeated work

Use the API when the same calculation needs to run inside your product or workflow.

FAQ

How does the Warsaw method calculate mealtime insulin?

Immediate units equal carbohydrate_g divided by icr. Fat-protein units equal (9 × fat_g + 4 × protein_g) / 100. Extended units equal FPU × 10 / icr. Total units are the sum. Negative nutrient grams are rejected.

What is a fat-protein unit (FPU)?

One FPU is 100 kcal from fat and protein. Fat contributes 9 kcal per gram and protein 4 kcal per gram. Each FPU is treated as having the glucose-raising effect of 10 g of carbohydrate.

How long should the extended bolus run?

The Warsaw School table used here is: 0 FPU → 0 h; up to 1 FPU → 3 h; up to 2 FPU → 4 h; up to 3 FPU → 5 h; more than 3 FPU → 8 h. Your pump or clinician may adjust the band.

Why was my request rejected?

carbohydrate_g, fat_g, and protein_g must be finite non-negative numbers. icr must be a finite number greater than zero. Missing, non-numeric, infinite, or negative nutrient values return invalid_input and are not billed.

What does the Warsaw method calculator cost?

The browser tool is free. API requests use prepaid KIT balance at $0.002 per successful call; invalid input is not billed. This worksheet is educational and is not a medical prescription.

For developers — API access

Everything on this page is available programmatically. This section is for teams who want to wire it into their own systems; everyone else can just use the tool above.

API endpoint

POSThttps://api.kit.forhosting.com/health/warsaw-method

Prefer to automate it? One authenticated POST creates the task; the result comes back by webhook or a signed link. The same capability also runs here on the web, by email and from Telegram — and soon from our app too.

Call it from your stack

curl -X POST https://api.kit.forhosting.com/health/warsaw-method \
  -H "Authorization: Bearer $KIT_KEY" \
  -H "Content-Type: application/json" \
  -d '{"carbohydrate_g":60,"fat_g":20,"protein_g":30,"icr":10}'

const res = await fetch("https://api.kit.forhosting.com/health/warsaw-method", {
  method: "POST",
  headers: {
    "Authorization": `Bearer ${process.env.KIT_KEY}`,
    "Content-Type": "application/json"
  },
  body: JSON.stringify({
    "carbohydrate_g": 60,
    "fat_g": 20,
    "protein_g": 30,
    "icr": 10
  })
});
const { task_id } = await res.json();

import os, requests

res = requests.post(
    "https://api.kit.forhosting.com/health/warsaw-method",
    headers={"Authorization": f"Bearer {os.environ['KIT_KEY']}"},
    json={
    "carbohydrate_g": 60,
    "fat_g": 20,
    "protein_g": 30,
    "icr": 10
},
)
task_id = res.json()["task_id"]

<?php
$res = file_get_contents("https://api.kit.forhosting.com/health/warsaw-method", false, stream_context_create([
  "http" => [
    "method"  => "POST",
    "header"  => "Authorization: Bearer " . getenv("KIT_KEY") . "\r\nContent-Type: application/json",
    "content" => '{"carbohydrate_g":60,"fat_g":20,"protein_g":30,"icr":10}',
  ],
]));
$task = json_decode($res, true);

body := bytes.NewBufferString(`{"carbohydrate_g":60,"fat_g":20,"protein_g":30,"icr":10}`)
req, _ := http.NewRequest("POST", "https://api.kit.forhosting.com/health/warsaw-method", body)
req.Header.Set("Authorization", "Bearer "+os.Getenv("KIT_KEY"))
req.Header.Set("Content-Type", "application/json")
res, _ := http.DefaultClient.Do(req)

Example request

{
  "carbohydrate_g": 60,
  "fat_g": 20,
  "protein_g": 30,
  "icr": 10
}

Example response

{
  "task_id": "tsk_a1b2c3d4e5f6a1b2c3d4e5f6",
  "type": "health.warsaw_method",
  "status": "queued",
  "_links": {
    "result": "/tasks/tsk_…/result"
  }
}

The API is asynchronous: the call returns a task_id immediately and the result arrives by webhook. Polling is capped at 1 req/s per task.

Pricing

Per request$0.002

Published price — no tokens, no invented credits. A failed task is never charged.

Errors

HTTP	Code	Meaning
`401`	`unauthorized`	Missing or invalid API key.
`402`	`insufficient_balance`	Your balance doesn't cover the task price.
`404`	`unknown_type`	That task type doesn't exist.
`429`	`rate_limited`	Too many requests. Use the webhook instead of polling.

Read the full KIT documentation →