---
description: Interactive IP subtraction calculator component.
title: Subtract IP calculator
image: https://developers.cloudflare.com/og-docs.png
---

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# Subtract IP calculator

Last updated Aug 20, 2026|Copy as Markdown|[View as Markdown](https://developers.cloudflare.com/style-guide/build-the-page/components/subtract-ip-calculator/index.md)|[Agent setup](https://developers.cloudflare.com/agent-setup/)

The `SubtractIPCalculator` component is used `6` times on `5` pages.

See all examples of pages that use SubtractIPCalculator

Used **6** times.

**Pages**

* [/cloudflare-one/networks/routes/reserved-ips/](https://developers.cloudflare.com/cloudflare-one/networks/routes/reserved-ips/)\-[Source](https://github.com/cloudflare/cloudflare-docs/blob/production/src/content/docs/cloudflare-one/networks/routes/reserved-ips.mdx)
* [/style-guide/build-the-page/components/subtract-ip-calculator/](https://developers.cloudflare.com/style-guide/build-the-page/components/subtract-ip-calculator/)\-[Source](https://github.com/cloudflare/cloudflare-docs/blob/production/src/content/docs/style-guide/build-the-page/components/subtract-ip-calculator.mdx)

**Partials**

* [src/content/partials/cloudflare-one/tunnel/deployment-guides/cloud-private-ip.mdx](https://github.com/cloudflare/cloudflare-docs/blob/production/src/content/partials/cloudflare-one/tunnel/deployment-guides/cloud-private-ip.mdx)
* [src/content/partials/cloudflare-one/tunnel/warp-to-tunnel-route-ips.mdx](https://github.com/cloudflare/cloudflare-docs/blob/production/src/content/partials/cloudflare-one/tunnel/warp-to-tunnel-route-ips.mdx)
* [src/content/partials/cloudflare-one/warp/add-split-tunnels-route.mdx](https://github.com/cloudflare/cloudflare-docs/blob/production/src/content/partials/cloudflare-one/warp/add-split-tunnels-route.mdx)

## Import

```mdx
import { SubtractIPCalculator } from "~/components";
```

## Usage

  
Base CIDRSubtracted CIDRs

Calculate

```mdx
import { SubtractIPCalculator } from "~/components";

<SubtractIPCalculator client:load />
```

## `<SubtractIPCalculator>` Props

### `defaults`

**type:** `object`

An optional object containing `base` (`string`) and `subtract` (`string[]`) properties, to set default inputs.

**example:**

Base CIDRSubtracted CIDRs

Calculate

```mdx
import { SubtractIPCalculator } from "~/components";

<SubtractIPCalculator
	client:load
	defaults={{
		base: "10.0.0.0/8",
		subtract: ["10.0.0.0/24", "10.32.0.0/11"]
	}}
/>
```

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## On this page

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```json
{"@context":"https://schema.org","@type":"TechArticle","@id":"https://developers.cloudflare.com/style-guide/build-the-page/components/subtract-ip-calculator/#page","headline":"Subtract IP calculator · Cloudflare Style Guide","description":"Interactive IP subtraction calculator component.","url":"https://developers.cloudflare.com/style-guide/build-the-page/components/subtract-ip-calculator/","inLanguage":"en","image":"https://developers.cloudflare.com/og-docs.png","dateModified":"2026-08-20","publisher":{"@type":"Organization","name":"Cloudflare","description":"One platform for your apps, agents, and workforce. Build, secure, and scale without managing infrastructure","url":"https://www.cloudflare.com/","sameAs":["https://github.com/cloudflare","https://www.linkedin.com/company/cloudflare","https://x.com/cloudflare"],"logo":{"@type":"ImageObject","url":"https://developers.cloudflare.com/logo.svg"},"address":{"@type":"PostalAddress","streetAddress":"101 Townsend St","addressLocality":"San Francisco","addressRegion":"CA","postalCode":"94107","addressCountry":"US"},"contactPoint":[{"@type":"ContactPoint","contactType":"Customer Support","url":"https://support.cloudflare.com/","availableLanguage":["English"]},{"@type":"ContactPoint","contactType":"Sales","url":"https://www.cloudflare.com/contact/","availableLanguage":["English"]}]},"isPartOf":{"@type":"WebSite","@id":"https://developers.cloudflare.com/#website","name":"Cloudflare Docs","url":"https://developers.cloudflare.com/"}}
```