You’ve found 5e Jump Calculator, a small online tool designed to tackle a surprisingly fiddly D&D 5e rule: figuring out jumps.

If you’ve ever been the DM who halted the action to dig through the PHB, debated if that chasm is actually jumpable, or tried to remember which stats affect jump distance, this site is for you.

So, What Does This Site Do?

5e Jump Calculator is a simple online helper that takes the 5e jump rules and does the math for you.

You enter a few details about your character—including Strength, height, and situational modifiers—and the calculator immediately calculates your:

Long jump distance

Maximum high jump

Maximum reach during a jump

Other useful jump-related numbers based on the official rules

No guesswork, no mid-session rule dives—just clear results you can rely on.

Why I Built This Tool

This site was born from actual game-night problems.

As a Dungeon Master and player, I often hit the same situation:

A player asks, "Can I make that jump?" and the entire table stalls while we check the rules.

The 5e rules for jumping aren’t especially complicated, but they are easy to forget. I was tired of re-reading the same paragraph every few sessions, so I took the obvious next step: I wrote a little web app.

5e Jump Calculator was originally just a quick private tool, and then I decided to share it in case other tables were running into the same problem.

How the Calculator Handles the Rules

This tool follows the official Dungeons & Dragons 5th Edition jumping rules as laid out in the core rules. In simple terms, it:

Uses your Strength score to determine base jump distances

Considers whether you have a running start

Factors in your height and reach where appropriate

Respects the rules as written, without adding homebrew assumptions

You never have to think about the math directly. The calculator does the work and shows you the result that matters at the table.

Making the Most of the Calculator

5e Jump Calculator is meant to be:

Fast enough to use mid-session

Accessible for beginners

Trustworthy enough for rules-focused groups

You can use it to:

Check whether a character can clear an obstacle before they commit

Plan interesting movement options during encounter prep

Resolve player stunts without bogging things down

Open the site, fill in the fields, and you’re done. It’s meant to get out of the way, not become the focus of the session.

Future Plans

Right now, 5e Jump Calculator is deliberately simple: it solves the jump problem and stops there.

In the future, I plan to:

Expand into other movement calculators

Support more edge cases and optional rules

Improve the layout and usability based on feedback

If you find a bug, or if you have an idea for improvement, I’d love to hear from you. This site is built to help real tables, and your feedback helps shape what it becomes next.

Thanks for using 5e Jump Calculator. Here’s hoping it keeps your sessions moving and your .