Compare calculators
Both calculators run independently β change the inputs on either side to compare results.
Everyday
Pet Age Calculator (Dog + Cat Years)
Convert your dog or cat's age into 'human years' using the modern 2019 UCSD epigenetic-clock formula for dogs, and a common veterinary piecewise chart for cats. Better than the old 'multiply by 7' rule of thumb.
Fill in the required fields to see your result.
Time Zones
Day of the Week Calculator
Given any calendar date in YYYY-MM-DD form, return the day of the week (Monday through Sunday). Handles historical dates back to 1900 and forward through the century.
Fill in the required fields to see your result.
Key differences
| Pet Age Calculator (Dog + Cat Years) | Day of the Week Calculator | |
|---|---|---|
| Category | Everyday | Time Zones |
| Inputs required | 2 | 1 |
| Result | Human-equivalent age (human years) | Day of the Week |
| What it does | Convert your dog or cat's age into 'human years' using the modern 2019 UCSD epigenetic-clock formula for dogs, and a common veterinary piecewise chart for cats. Better than the old 'multiply by 7' rule of thumb. | Given any calendar date in YYYY-MM-DD form, return the day of the week (Monday through Sunday). Handles historical dates back to 1900 and forward through the century. |