Thanks for visiting 5e Jump Calculator, a small online tool designed to tackle a surprisingly fiddly D&D 5e rule: jumping.

If you’ve ever been the DM who stopped a session to look up the exact jumping rules, debated whether a running start is enough, or tried to reconstruct from memory how Strength and movement interact, this site is for you.

So, What Does This Site Do?

5e Jump Calculator is a no-frills calculator that turns the official 5th rules into instant numbers.

You plug in your character’s stats—including Strength, height, and situational modifiers—and the calculator spits out your:

Long jump distance

High jump height

Effective reach while jumping

Other useful jump-related numbers based on the official rules

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

Why I Built This Tool

This site was the result of actual game-night problems.

As a Dungeon Master and player, I kept running into the same situation:

Someone wants to clear a gap, leap to a ledge, or vault over an obstacle, the entire table stalls while we check the rules.

The 5e rules for jumping are simple on paper but annoying in the moment. I found myself reaching for the PHB over and over again, so I took the obvious next step: I built a calculator.

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 slowdown.

Under the Hood (Without the Jargon)

This tool uses the official Dungeons & Dragons 5th Edition jumping rules as written in the PHB. In simple terms, it:

Uses your Strength to set how far and how high you can jump

Considers whether you have a running start

Uses your height for realistic reach calculations

Respects the rules as written, without adding homebrew assumptions

You never have to think about the math directly. The calculator takes care of it and shows you the result that matters at the table.

Using This Tool During Play

5e Jump Calculator is meant to be:

Simple enough to use during combat

Understandable even if you’re new to 5e

Trustworthy enough for rules-focused groups

You can use it to:

Verify a jump before the roll

Plan interesting movement options during encounter prep

Keep cinematic moments moving without arguing over distances

Just enter the stats and read the output. It’s meant to get out of the way, not steal the spotlight.

Where This Might Go

Right now, 5e Jump Calculator is kept lean on purpose: it solves the jump problem and stops there.

In the future, I may:

Expand into other movement calculators

Support more edge cases and optional rules

Improve the layout and usability based on feedback

If you spot something off, or if you have a suggestion, feel free to reach out. This site is for DMs and players like you, and your input directly guides future changes.

Thanks for stopping by. Here’s hoping it keeps your sessions moving and your jumps heroic.