1. What is the RPM to G Formula?

Definition: This calculator converts rotational speed (RPM) and radius to relative centrifugal force (RCF) expressed in G-forces.

Purpose: It's commonly used in centrifugation processes to determine the force applied to samples.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( G \) — Relative centrifugal force (G-force)
• \( RPM \) — Rotations per minute (rev/min)
• \( r \) — Rotor radius (cm)

Explanation: The formula relates the rotational speed and radius to the centrifugal force experienced.

3. Importance of RPM to G Conversion

Details: Accurate conversion is crucial in laboratory settings for proper sample separation and protocol standardization.

4. Using the Calculator

Tips: Enter the RPM (rotations per minute) and rotor radius in centimeters. Both values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: Why is the constant 894 used in the formula?
A: The constant 894 comes from the gravitational acceleration (9.81 m/s²) and unit conversions to give G-force in terms of Earth's gravity.

Q2: How do I measure the rotor radius?
A: Measure from the center of rotation to the bottom of the sample tube when it's in the horizontal position.

Q3: Can I use this for any centrifuge?
A: Yes, as long as you have the correct RPM and radius measurements for your specific rotor.

Q4: Why is G-force important in centrifugation?
A: G-force determines the separation efficiency and is often specified in experimental protocols.

Q5: What's a typical G-force range for laboratory centrifuges?
A: Common ranges are 1,000-20,000 G for benchtop centrifuges, up to 100,000 G for ultracentrifuges.