Free everyday tools
A growing set of free, browser-only calculators and planners for time, sleep, movement and the outdoors. No login, nothing stored on your device.
Pick a category
Every tool here does one thing well, works in your browser and keeps nothing. Choose a category to see what is inside, or jump straight to the ones you use most.
Time and dates
Count down to what matters, work out an exact age, and stop doing date maths in your head.
Sleep
Work back from your alarm to a sensible bedtime, size a nap, and plan around a flight.
Movement
Turn steps, distance and effort into numbers you can act on.
Outdoors
Plan around the sun, the season and the weather before you head out.
Time and dates
Count down to what matters, work out an exact age, and stop doing date maths in your head. See all time and dates tools →
Age calculator
Your exact age in years, months and days — and how many days until your next birthday.
Countdown to a date
Days, hours and minutes until a holiday, deadline or trip.
Days between dates
The exact number of days from one date to another, with or without weekends.
Time-zone converter
What time it is in another city, so you call at a civilised hour.
Week number
Which ISO week of the year any date falls in — handy for planning.
Sleep
Work back from your alarm to a sensible bedtime, size a nap, and plan around a flight. See all sleep tools →
Bedtime calculator
Set your wake-up time and get bedtimes that land at the end of a sleep cycle, so you wake less groggy.
Sleep-need by age
How much sleep is typical for a child, teenager or adult.
Nap timer
How long to nap for a quick refresh without waking up foggy.
Jet-lag planner
How to shift your body clock before and after crossing time zones.
Caffeine cut-off
The last time to have coffee if you want it out of the way by bedtime.
Movement
Turn steps, distance and effort into numbers you can act on. See all movement tools →
Steps to distance
What your step count is in kilometres and miles, adjusted for your height.
Calories burned
Roughly how many calories a walk, run or workout burned.
Running pace
Your pace per kilometre or mile, and finish times for common distances.
BMI calculator
Your body-mass index and the healthy range for your height.
Ideal weight range
A healthy weight range for your height, in your preferred units.
Outdoors
Plan around the sun, the season and the weather before you head out. See all outdoors tools →
Sunburn and vitamin D
How long you can stay in the sun by skin type and UV, and when your skin makes vitamin D.
Daylight hours
Sunrise, sunset and how much daylight you get today.
Hydration for activity
Roughly how much to drink around exercise and in the heat.
Feels-like temperature
How cold the wind makes it feel, and how hot the humidity does.
Tick and outdoor season
When ticks, mosquitoes and other seasonal risks peak, and how to avoid them.
Frequently asked questions
Are these tools really free?
Yes. Everything here runs in your browser, needs no account and stores nothing about you. They link through to the fuller versions on TempoLife when you want to save a result over time.
Do you store what I enter?
No. These are simple calculators — the numbers you type stay on your device and are not sent anywhere or kept.
What is the difference from the app?
The tools answer a one-off question. The TempoLife app remembers your answers and turns them into trends — your weight over months, your sleep across weeks — which a single calculation cannot.
Keep your numbers, not just calculate them
TempoLife saves what these tools work out and shows how it changes over weeks and months.