Jumping a gap adds no free movement. Under the 2024 D&D Basic Rules, every foot of a Long Jump costs a foot of movement. DMGrid can represent the route on its board while you record the calculation; a range circle does not determine whether the jump meets the rules.
Here is a specific example: Speed 30 feet, Strength 10, ordinary ground and no feature modifying the jump. The character moves 10 feet, then wants to jump another 10. That uses 20 feet and leaves 10 feet of movement.
Jump distance and turn budget
The Long Jump rule lets you leap horizontally up to your Strength score if you moved at least 10 feet immediately beforehand. With Strength 10, that jump’s limit is 10 feet. Without the run-up, a standing Long Jump permits half the distance: 5 feet in this example.
These are separate checks. Strength determines the distance allowed for that type of jump; available movement must pay for both approach and jump. Do not add “30 movement plus 10 jumping” and announce a 40-foot route.
Nor should you substitute the Strength modifier for the score in that distance limit. This example uses Strength 10, not a supposed zero-foot range because the modifier is +0.
Prepare the scene in DMGrid
- Agree on map scale and the gap’s edges. The drawing’s appearance does not set distance.
- Use the distance ruler to check the approach and width to cross.
- Check movement already spent before reaching this point. Our calculation assumes the full 30 feet remained available.
- Resolve the jump using the rule and DM judgement, then place the piece and record remaining movement.
DMGrid provides a tactical board, distance ruler, walking/running circles and notes. They help represent the decision; this guide does not claim they automatically calculate jumps or prevent illegal movement.
Change the terrain, check again
The example assumes ordinary landing ground with no height obstacle. The 2024 rule adds a DC 10 Dexterity (Acrobatics) check when landing in Difficult Terrain to avoid becoming Prone. Other obstacles may require additional DM judgement. Do not apply the simple calculation to every scene without checking its conditions.
DMGrid is a paid Windows beta for in-person play on one computer. Consult the product facts and official 2024 Long Jump rule. Before the next jump, prepare distance, run-up and remaining movement in that order.