How to Calculate Strength DnD 5e

Updated 6 November 2026 · Standard formula, shown below

This guide explains how to calculate and use the Strength ability score in Dungeons & Dragons 5th Edition. You’ll learn how to determine your Strength modifier, how it affects attacks and carrying capacity, and how to apply it correctly during play. No special tools are needed—just your character sheet, dice, and this guide.

What You’ll Need

Your D&D 5e character sheet (or a blank one)
A set of dice (or a dice app) for rolling ability scores
The Player’s Handbook (or basic rules) for reference
A pencil and eraser

Step-by-Step

Determine your base Strength score. You can do this in one of three ways: roll 4d6 and drop the lowest die (repeat six times, assign one result to each ability), use the standard array (15, 14, 13, 12, 10, 8), or use the point-buy system (27 points, costs vary). Choose the method your DM allows.
Apply racial bonuses (if any). Some races give a +2 or +1 to Strength. For example, a mountain dwarf gets +2 to Strength. Add these to your rolled or chosen score. Note: in Tasha’s Cauldron of Everything, you can move these bonuses to any ability, so check with your DM.
Calculate your Strength modifier. The modifier is (Strength score – 10) ÷ 2, rounded down (toward negative infinity). For example, a score of 15 gives (15-10)/2 = 2.5, rounded down to +2. A score of 8 gives (8-10)/2 = -1. Use the table below for quick reference.
Record your modifier. Write the modifier (e.g., +2 or -1) in the small box next to Strength on your character sheet. This is the number you’ll use for most checks and saves.
Apply the modifier to Strength checks and saves. When you attempt a Strength check (like forcing open a door) or a Strength saving throw (like resisting being pushed), roll a d20 and add your Strength modifier. Also add your proficiency bonus if you are proficient in Athletics (for checks) or if you have proficiency in Strength saves (usually from your class).
Use Strength for melee attacks. For most melee weapons, you add your Strength modifier to the attack roll and the damage roll. For example, with a longsword and a +3 Strength modifier, you roll d20+3 to hit and 1d8+3 for damage (or 1d10+3 if used two-handed).
Calculate your carrying capacity. Your carrying capacity in pounds is your Strength score × 15. For example, a Strength of 15 gives 225 pounds. You can push, drag, or lift up to twice that (450 pounds) but your speed drops to 5 feet if you exceed your carrying capacity.
Determine your push, drag, or lift limit. This is your carrying capacity × 2. For a Strength of 15, that’s 450 pounds. If you exceed this, you cannot move at all. These rules are in the Player’s Handbook (Chapter 7).

Common Mistakes

Rounding incorrectly: Always round down (toward negative infinity). A score of 9 gives (9-10)/2 = -0.5, rounded down to -1. Some players mistakenly round to 0.
Forgetting to add proficiency: You only add your proficiency bonus to Strength checks if you are proficient in Athletics, and to Strength saves if your class grants proficiency. Don’t add it to every Strength roll.
Using Strength for finesse weapons: Finesse weapons (like a rapier) allow you to use either Strength or Dexterity. Choose one and stick with it for that attack. You can’t mix—use Strength for attack and Dexterity for damage.
Confusing carrying capacity with push/drag/lift: Carrying capacity is Strength × 15. Push, drag, or lift is double that. Many players use the wrong multiplier.
Not updating after ability score increases: When you gain an Ability Score Improvement (usually at 4th, 8th, 12th, 16th, and 19th level), update your Strength score and recalculate the modifier.

Tips

Use the standard array if you want balance: It’s reliable and avoids the randomness of rolling.
Consider your character concept: A barbarian or fighter will want high Strength, but a wizard might dump it. Choose based on your role.
Remember the encumbrance variant rule: If your DM uses the optional encumbrance rule, you are lightly encumbered if you carry more than Strength × 5 pounds, and heavily encumbered if more than Strength × 10. This can affect speed and checks.
Use Athletics for grappling and shoving: When you grapple or shove, you make a Strength (Athletics) check contested by the target’s Athletics or Acrobatics. Your Strength modifier is key.
Don’t forget the jump distance: Your long jump distance is your Strength score in feet (if you move at least 10 feet before jumping). Your high jump is 3 + your Strength modifier in feet.

Troubleshooting

If your modifier seems wrong: Double-check your math. Use the formula (score-10)/2, rounding down. For even scores, it’s straightforward: 12 gives +1, 14 gives +2, etc. For odd scores, subtract 10, divide by 2, and drop the decimal: 15 → 2.5 → +2.
If you’re unsure about racial bonuses: Look up your race in the Player’s Handbook or the Basic Rules. If you’re using Tasha’s custom origin rules, you can place the +2 and +1 anywhere, but you must decide before play.
If you’re confused about which weapons use Strength: Check the weapon’s properties. If it has the “Finesse” property, you can choose Strength or Dexterity. Otherwise, melee weapons use Strength, and ranged weapons use Dexterity. Thrown weapons (like a handaxe) use Strength for both attack and damage, unless they’re finesse.
If you’re playing a class that gets Extra Attack: Remember that you add your Strength modifier to damage for each attack, not just once. This is a common oversight.
If you’re using a spell that requires a Strength save: The target rolls a d20 and adds their Strength modifier. Your spell save DC is 8 + your proficiency bonus + your spellcasting ability modifier. The target’s Strength modifier is what they add to their roll.

Frequently Asked Questions

What is the formula for Strength modifier?

The modifier is (Strength score – 10) ÷ 2, rounded down. For example, a score of 18 gives (18-10)/2 = 4, so +4.

Do I add my proficiency bonus to Strength checks?

Only if you are proficient in Athletics for Strength checks, or if your class gives you proficiency in Strength saving throws. Otherwise, you just add your Strength modifier.

Can I use Strength with a bow?

No. Bows use Dexterity. Strength is for melee weapons and thrown weapons that aren’t finesse. Some weapons, like a heavy crossbow, also use Dexterity.

How much can I carry?

Your carrying capacity is your Strength score × 15 pounds. For example, a Strength of 10 allows 150 pounds. You can push, drag, or lift up to twice that, but your speed drops to 5 feet if you exceed your carrying capacity.

What is the difference between a Strength check and a Strength save?

A Strength check is an action you take, like forcing a door open or grappling. A Strength save is a reaction to a threat, like resisting a spell that pushes you. Both use your Strength modifier, but you add proficiency only if you have it for that specific type.

How do I increase my Strength score?

You can increase it when you gain an Ability Score Improvement (typically at 4th, 8th, 12th, 16th, and 19th level) by 2 points, or by 1 point if you also take a feat. Some magical items or boons can also increase it.

Method: the standard formula for this calculation, rounded as each result states. See how the calculators work or report an error.