*Note: This drawing illustrates an example iron with a .800 basic vertical c.g. and 4 different rearward c.g. location calculations for reference.*
In most modern irons, the Actual Vertical C.G. height will be less than the Basic Vertical C.G. height. However, if one is calculating the Actual Vertical C.G. of some short irons (usually #8 or #9 and wedges), a number of times the Actual Vertical C.G. will be higher than the Basic Vertical C.G. because the C.G. is located outside the clubhead in front of the face.

### How To Calculate Actual Vertical Center of Gravity Location

Below shows the formula to calculate the Actual Vertical Center of Gravity location. These diagrams assigns letter characters to the specific dimensions that are required to do the calculations.

#### Key

**B** – Basic Vertical Center of Gravity
**T** – Tangent of #5 Iron Loft
**L** – Leading Edge Measurement Point To Actual Balance Point On Face Plane
**R** – Rearward Center of Gravity
**H** – Horizontal Distance Of Center Of Gravity In Head Measured From Basic Vertical Center of Gravity Point On Face Plane
**D** – Vertical Center Of Gravity Location Adjustment
**V** – Actual Vertical Center Of Gravity

#### Step 1

### B x T = L

**B** – Basic Vertical Center of Gravity

**T** – Tangent of #5 Iron Loft

**L** – Leading Edge Measurement Point To Actual Balance Point On Face Plane)

#### Step 2

### R – L = H

**R** – Rearward Center of Gravity

**L** – Leading Edge Measurement Point To Actual Balance Point On Face Plane

**H** – Horizontal Distance Of Center Of Gravity In Head Measured From Basic Vertical Center of Gravity Point On Face Plane

#### Step 3

### H x T = D

**H** – Horizontal Distance Of Center Of Gravity In Head Measured From Basic Vertical Center of Gravity Point On Face Plane

**T** – Tangent of #5 Iron Loft

**D** – Vertical Center Of Gravity Location Adjustment

#### Step 4

### B x D = V

**B** – Basic Vertical Center of Gravity

**D** – Vertical Center Of Gravity Location Adjustment

**V** – Actual Vertical Center Of Gravity

### Example

#### Step 1 (B x T = L)

.800″ x TAN 27° (.50952) = .408″

#### Step 2 (R – L = H)

.562″ – .408″ = .154″

#### Step 3 (H x T = D)

.154″ x TAN 27° (.50952) = .078″

#### Step 4 (B – D = V)

.800″ – .078″ = **.722″** (Actual Vertical Center of Gravity)

Go ahead and pick a loft, a Rearward and Basic Vertical Center Of Gravity out of the air and do the calculation for practice. Remember, the goal here is for anyone to pick any head and be able to accurately find the Actual Center Of Gravity location, if desired. Of course, if you want to calculate MPF, use a #5 or #6 iron.