1. What is Per Mille?

Per mille (‰) means "per thousand" and represents parts per thousand. It is similar to percentage but uses a base of 1000 instead of 100. The per mille symbol (‰) is used to denote this measurement.

2. How Does the Calculator Work?

The calculator uses the per mille formula:

Where:

• \( Part \) — The portion or subset of the whole
• \( Whole \) — The total or complete amount

Explanation: The formula calculates how many parts per thousand the part represents of the whole.

3. Importance of Per Mille Calculation

Details: Per mille calculations are important in various fields including finance (interest rates), chemistry (concentrations), demography (birth/death rates), and quality control (defect rates).

4. Using the Calculator

Tips: Enter the part and whole values as numbers. Both values must be valid (part ≥ 0, whole > 0). The calculator will compute the per mille value.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between percentage and per mille?
A: Percentage means "per hundred" (base 100) while per mille means "per thousand" (base 1000). 1% = 10‰.

Q2: Where is per mille commonly used?
A: Per mille is used in blood alcohol content measurements, railway gradients, birth rates, and various scientific measurements.

Q3: How do I convert per mille to percentage?
A: To convert per mille to percentage, divide the per mille value by 10.

Q4: Can per mille be greater than 1000?
A: Yes, if the part is greater than the whole, the per mille value will exceed 1000‰.

Q5: What are some practical examples of per mille usage?
A: A blood alcohol content of 0.8‰ means 0.8 grams of alcohol per 1000 grams of blood. A railway gradient of 10‰ means a rise of 10 meters per 1000 meters of track.