What Does Actuation Force Mean on a Mechanical Keyboard Switch?

When comparing mechanical keyboard switches, you will frequently see specifications such as 45 gf actuation force, 50 gf operating force, or 60 gf tactile force. But what do those numbers actually mean when you are typing or gaming?

Actuation force is, in simple terms, the amount of force you need to apply with your finger to activate a switch. A lower number generally means a lighter switch, while a higher number means you will feel more resistance when pressing the key.

Actuation force does not tell the whole story, however. Two switches with the same stated force can feel very different because of their spring, tactile bump, travel distance, bottom-out force, and overall construction.

Quick choice

Want a light switch that is easy to press? Look towards lower actuation forces, often around 35–45 gf. Prefer more resistance and fewer accidental keypresses? Around 50–65 gf or higher may suit you better. Just remember that actuation force is only one part of how a switch feels.

1. What exactly is actuation force?

A mechanical keyboard switch registers a keypress before the key reaches the bottom of its travel. The position where the input is registered is called the actuation point.

Actuation force describes approximately how much force is required to operate the switch around that point.

As a rough guide:

• 35 gf: very light
• 45 gf: light and very common
• 55 gf: medium to moderately heavy
• 65 gf: noticeably heavier
• 70+ gf: heavy for most users

These are not strict categories. The complete switch design determines how heavy it actually feels.

2. What does gf mean?

Keyboard switch force is commonly specified in gf, meaning gram-force.

If a switch has an operating force of 45 gf, approximately the same force exerted by a 45 gram mass under normal gravity is required.

You may also see force specified in cN, or centinewtons.

• 1 gf ≈ 0.98 cN
• 45 gf ≈ 44 cN
• 60 gf ≈ 59 cN

Because the values are very close, gf and cN are sometimes treated almost interchangeably in casual keyboard discussions, although they are technically different units.

3. Is 45 gf a light switch?

For mechanical keyboards, around 45 gf is generally considered light. Many popular linear switches fall around this range.

A 45 gf switch requires relatively little finger force and is therefore popular for:

• Gaming
• Rapid repeated inputs
• Light typists
• Long keyboard sessions

The trade-off is that very light switches can be easier to activate accidentally if you rest your fingers heavily on the keys.

4. Does lower actuation force mean a faster switch?

Not necessarily.

A lower actuation force means you need less physical force to press the switch. This can make it feel quick and effortless, but it does not automatically mean that the switch registers sooner.

Other specifications also influence speed:

• Pre-travel: how far the switch moves before registering.
• Spring design: how resistance changes throughout the keypress.
• Reset point: when the switch becomes ready to activate again.
• Switch technology: for example mechanical contact or Hall Effect.

A 45 gf switch with 2.0 mm pre-travel may therefore need to move farther before activation than a 50 gf switch with only 1.2 mm pre-travel.

5. Actuation force vs bottom-out force

These specifications are often confused.

• Actuation force: the force around the point where the input registers.
• Bottom-out force: the force required near the end of the switch's complete travel.

A switch may have a 45 gf actuation force but require roughly 55 or 60 gf when fully pressed.

This happens because the spring becomes increasingly compressed as the key moves downward.

In plain English: actuation force tells you more about the force around registration, while bottom-out force tells you more about how heavy the key feels when pressed all the way down.

6. Actuation force on linear switches

With a linear switch, resistance usually increases relatively smoothly throughout the keypress. There is no tactile bump or click mechanism.

This makes operating-force specifications on linear switches relatively straightforward to compare.

Force	General feel	Often suitable for
35–40 gf	Very light	Gaming, light typists
45 gf	Light	Gaming and general use
50–55 gf	Medium	General typing
60–65 gf	Heavier	Typists wanting more resistance
70+ gf	Heavy	Users who prefer a firm keypress

These categories are approximate; actual feel varies from one switch to another.

7. Actuation force on tactile switches

With tactile switches, force specifications become more complicated.

A tactile switch contains a noticeable bump during the keypress. A manufacturer may therefore list several different values:

• Initial force
• Operating force
• Tactile force
• Peak force
• Bottom-out force

A tactile switch with a 45 gf operating force could, for example, have a tactile peak of 55 or 60 gf. It may therefore feel considerably heavier than a 45 gf linear switch.

For tactile switches, you should avoid judging the entire switch from a single force specification.

8. What about clicky switches?

Clicky switches provide both physical feedback and an audible click.

Like tactile switches, the clicking mechanism can introduce additional resistance. A clicky switch with the same listed operating force as a linear switch can therefore feel sharper or heavier.

This is particularly noticeable on switches with pronounced click-bar mechanisms.

9. Why don't two 45 gf switches feel the same?

This is one of the most important things to understand when comparing keyboard switches.

Two switches rated at 45 gf can feel completely different because of:

• Spring length
• Progressive or linear spring characteristics
• Initial force
• Bottom-out force
• Tactile bump
• Pre-travel
• Total travel
• Stem and housing materials
• Factory lubrication

It is better to think of actuation force as one point on a switch's complete force curve rather than a complete description of its feel.

10. Which actuation force should you choose?

Preference	Good starting point
Extremely light keypress	35–40 gf
Light gaming switch	40–45 gf
All-round use	45–55 gf
More resistance	55–65 gf
Heavy, firm keypress	65+ gf

Use these values as a starting point rather than a strict rule. Personal preference matters enormously.

Someone accustomed to very light Red-style switches might find 60 gf heavy, while someone who normally uses firm tactile switches may consider the same force perfectly normal.

11. Common mistakes when comparing switch force

• Looking only at gf: travel and spring characteristics matter as well.
• Confusing actuation and bottom-out force: they refer to different points in the keypress.
• Directly comparing linear and tactile switches: a tactile bump changes perceived resistance.
• Assuming lighter always means faster: actuation distance is a separate specification.
• Assuming every 45 gf switch feels identical: the full force curve varies considerably between designs.

Conclusion

Actuation force describes approximately how much force is required to activate a mechanical keyboard switch. A lower value generally produces a lighter keypress, while a higher value usually produces more resistance.

Around 40–45 gf is commonly considered light, 50–55 gf medium, and 60 gf or more noticeably heavier. These numbers do not tell the entire story, though.

For a proper comparison, also consider pre-travel, bottom-out force, switch type, tactile force and spring design.

Want to compare different options? Browse our linear switches, tactile switches and clicky switches.