Body Shape Calculator
Bust 96 cm, waist 70 cm, and hips 98 cm suggest an hourglass-leaning result under the rules used here. This body shape calculator compares bust, waist, and hip measurements and applies a simple ruleset to suggest a broad body-shape category. Use the same unit for all three measurements. The result is descriptive only, so treat it as a sizing or styling guide rather than a health judgment.
Quick answer
The calculator compares bust, waist, and hip proportions instead of body weight.
Use the same unit for all three measurements. This form does not convert between inches and centimeters.
What this tells you
- •The calculator compares bust, waist, and hip proportions instead of body weight.
- •It suggests five broad outcomes: hourglass-leaning, triangle-leaning, inverted triangle-leaning, rectangle-leaning, and oval-leaning.
- •You can use inches or centimeters because the rules depend on proportions, not the unit itself.
- •The result is a descriptive estimate, not a diagnosis or a complete body assessment.
How to Use
- 1Choose inches or centimeters for the measurement labels.
- 2Enter your bust, waist, and hip measurements in that same unit.
- 3Calculate to see the suggested body-shape category and the supporting ratios.
- 4Use the result as a rough styling reference, then ignore it if it does not fit how you dress or size yourself.
How It Works
Formula
Bust-to-hip ratio = bust / hips
Waist-to-bust ratio = waist / bust
Waist-to-hip ratio = waist / hips
Rules used here:
1. Oval-leaning if waist is within 5% of both bust and hips
2. Hourglass-leaning if bust and hips are within 5% of each other and waist is at least 25% smaller than both
3. Triangle-leaning if hips are at least 5% larger than bust and waist is at least 20% smaller than hips
4. Inverted triangle-leaning if bust is at least 5% larger than hips and waist is at least 20% smaller than bust
5. Rectangle-leaning otherwiseThe calculator compares each measurement as a proportion, so the unit cancels out as long as bust, waist, and hips all use the same unit. The rules are intentionally simple and deterministic. They do not measure frame size, shoulder width, posture, muscle mass, or where you naturally carry weight.
Calculation note: values are processed in the order shown above, using the current input units.
Worked Examples
Hourglass-leaning example
Bust and hips are close to balanced, and the waist is more than 25% smaller than both, so the hourglass rule is the first match.
Triangle-leaning example
The hips are more than 5% larger than the bust, and the waist is at least 20% smaller than the hips, so the rules sort this set into the triangle group.
Body Shape Rules Used Here
These are the exact cutoffs used by this calculator.
| Category shown | Main proportion rule | How to read it |
|---|---|---|
| Oval-leaning | Waist within 5% of both bust and hips | Midsection measurements stay close to the upper and lower measurements |
| Hourglass-leaning | Bust and hips within 5%, waist at least 25% smaller than both | Upper and lower measurements stay balanced with a clearly smaller waist |
| Triangle-leaning | Hips at least 5% larger than bust, waist at least 20% smaller than hips | Lower-body measurement leads the set |
| Inverted triangle-leaning | Bust at least 5% larger than hips, waist at least 20% smaller than bust | Upper-body measurement leads the set |
| Rectangle-leaning | Any set that does not meet the stronger cutoffs above | Measurements read as more even overall |
This table is a practical classification system for broad shape labels. It is not a medical standard.
Common mistakes
- Mixing inches for one measurement with centimeters for another
- Measuring over thick clothing or at different landmarks each time
- Treating a descriptive body-shape label like a health score or value judgment
Limitations
This calculator uses a simple three-measurement ruleset only. It does not account for shoulders, rib cage width, posture, pregnancy, body composition, breast tissue changes, surgery, age-related changes, or how different brands cut clothing. A small change in the tape position can also shift the result.