| What it does | Free Karvonen formula heart rate zone calculator
| Birth chart calculator
|
|---|
| Stage | Established
| Not given
|
|---|
| Founded | Not given
| Not given
|
|---|
| Based in | Not given
| Not given
|
|---|
| Pricing model | Free
| Free
|
|---|
| Pricing | Not given
| Not given
|
|---|
| Key features | - Five personalized training zones based on heart rate reserve
- Accounts for resting heart rate and cardiovascular fitness
- Custom maximum heart rate input from multiple formulas
- No signup required, runs entirely in browser
- Weekly resting heart rate logging and progress tracking
- Zone-specific training guidance for different goals
- Shareable and printable zone results
- Embeddable calculator widget for websites
| - Calculate Sun, Moon and rising signs
- Shows ten planets and aspects
- Multiple house systems available
- Private data processing on device
- Save birth details to browser
- Support for unknown birth times
- Historical time zone handling
|
|---|
| What makes it different | - More accurate than age-only formulas, accounting for individual cardiovascular fitness
- Zones adapt as your fitness improves and resting heart rate drops
- Based on 1957 Karvonen research used by coaches and sports scientists
- Independent, no data collection or external servers
- No ads inside the calculator, free to use with optional embedding
| - Calculated entirely on your device with no cloud storage
- No account or login required
- Uses Astronomy Engine for precise geocentric calculations
- Explains astrological concepts and limitations
|
|---|
| Community votes | 0 | 0 |
|---|
| DR (Domain Rating by Ahrefs) | 11 ● no change since last check | 2 ● no change since last check |
|---|
| Trust Flow (Majestic) | 19 | 4 |
|---|
| Citation Flow (Majestic) | 25 | 12 |
|---|
| Referring domains (Majestic) | 40 | 3 |
|---|
CalculateMyHeartRate
birthchart.io