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Free calculators and timers, with nothing to sign up for
55 calculators, timers and printable sheets for bodies, sleep, time, and the arithmetic of keeping something up. Every one of them runs entirely in your browser.
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Printable habit tracker
Type your habits, pick a month, print. One page, boxes a pen fits in.
Make a sheetPrintables
Sheets built in your browser and sized for a pen: trackers, planners and challenges. Print them or save as PDF.
7 tools- Printable habit trackerType your habits, pick a month, print. The grid is sized so a pen fits in every box.
- Printable mood trackerA month as a calendar, one box a day, and a five-colour key you name yourself.
- Year in pixelsThe whole year on one page, a square a day, coloured in as it happens.
- Weekly habit trackerOne week at a time, with dates on every column and a count at the end of each row.
- Printable daily plannerA schedule down the left in the hours you choose, and the three things that matter on the right.
- 30 day challenge trackerA numbered, dated box for every day of the challenge, and the finish date before you begin.
- No sugar challenge trackerPick a length from 7 to 60 days, choose which version of the rules you are keeping, and tick each evening you held. Every box carries its date, so a missed day shows.
Habits
Counters for starting something, stopping something, and seeing what it costs.
11 tools- Life in weeksEvery week of a long life fits on one screen. Most of it is still empty.
- Quit smoking calculatorMoney kept and cigarettes not smoked since your quit date. Or, if you have not quit yet, the bill for the next year.
- Sobriety calculatorYour sober time in days, weeks, months, years and hours, your milestones and the date of the next one. Nothing is saved and no one sees it.
- Screen time calculatorFour hours a day sounds like a number. Sixty-one days a year sounds like a problem.
- Reading goal calculator52 books of 300 pages is 43 pages a day over a full year. Starting today, it is more. This works out your number from the days actually left.
- Alcohol units calculatorBuild your usual week from real drinks and see the units, the grams and the calories.
- Latte factor calculatorA small spend, repeated. What it adds up to, and what it could have grown to.
- 1% better every day calculator1% better a day for a year comes to 37.8 times where you started. 1% worse comes to almost nothing. Try your own numbers.
- 75 Hard trackerA free 75 Hard tracker: tick off the five daily rules and watch your 75-day grid fill up.
- 75 Soft challenge trackerA free 75 Soft challenge tracker: tick off four daily rules, take your weekly rest day, and watch a 75-day grid fill up.
- 75 Medium challenge trackerA free 75 Medium challenge tracker: one workout a day, a diet with no alcohol, water and reading, with a weekly rest day and a 75-day grid.
Planning
Deciding what to do first, and how much of the year is left to do it in.
2 toolsSleep and time
Timers and schedules that keep accurate time even when the tab is in the background.
11 tools- Sleep calculatorWork backwards from your alarm, or forwards from bedtime, in whole sleep cycles.
- Pomodoro timerTwenty-five minutes of work, five off, a longer break every fourth round. Adjustable if that split does not suit you.
- Interval timerSet work and rest, choose your rounds, and go. Includes a Tabata preset.
- Countdown timerDays, hours, and minutes to any date, ticking live.
- Sleep debt calculatorEnter the last seven nights. See what you are actually carrying.
- Online stopwatchStart, lap, stop. Keeps time correctly even in a background tab.
- Caffeine half-life calculatorA 95 mg coffee at 3pm still leaves about 31 mg at 11pm. See how much is left at your own bedtime, hour by hour.
- Box breathing timerFollow the circle. In as it grows, out as it shrinks, and a soft tone at each change so you can close your eyes.
- Week number calculatorThis week's number, worked out from your own device's date, and the number for any other date you pick.
- Online timerTap a preset or type a time. The alarm rings until you stop it.
- Meditation timerA bell to begin, a bell to end, and nothing to look at in between.
Body
Estimates from published formulas, with an honest account of what each one cannot see.
9 tools- BMI calculatorEnter height and weight. The number appears as you type, and nothing leaves your browser.
- Calorie calculatorEstimates how many calories you burn in a day, and what to eat to hold, lose, or gain weight.
- Water intake calculatorYour daily water in ounces, litres and glasses, from your weight, your exercise and the weather. The formula and its sources are under the result.
- Body fat calculatorThe US Navy circumference method. All you need is a tape measure.
- Ideal weight calculatorFour published formulas, side by side, plus the healthy BMI range for your height.
- Macro calculatorTurns a calorie target into grams of protein, carbs, and fat.
- Protein calculatorHow much protein a day, and roughly what that looks like on a plate.
- Waist to height calculatorOne measurement, one division, and a better risk screen than BMI.
- Intermittent fasting calculatorPick a schedule and a first meal. The window, and the time you stop eating, follow from those two.
Fitness
Training numbers worth knowing, and the ones that mislead if you read them wrong.
7 tools- Heart rate zone calculatorFive training zones from your age, with an option for the more accurate reserve method.
- Running pace calculatorGive it any two of pace, time, and distance, and it works out the third.
- One rep max calculatorEstimate a one rep max from a set you actually did, with the working percentages.
- Calories burned calculatorPick an activity and a duration. MET values do the rest.
- Steps to miles calculatorSteps to miles and km, or a distance back to steps, with calories and walking time. Your height sets the step length, or measure your own.
- Race time predictorOne recent race in, a predicted time for every common distance out.
- VO2 max calculatorTwo published ways to estimate VO2 max: run for 12 minutes, or measure your resting pulse.
Everyday maths
The arithmetic behind keeping something up, and the everyday sums around it.
8 tools- Habit streak calculator18 done out of 22 days is an 82% month, whatever the streak says. See both, plus the next milestone and how many days you can still miss.
- Percentage calculatorThe four percentage questions people actually search for, each with the working shown.
- Age calculatorExact age from a date of birth, plus total days lived and the countdown to your next birthday.
- Days between datesTotal days, working days, and the same span expressed in weeks and months.
- Unit converterLength, weight, temperature, and volume, converted as you type.
- Reading speed test and time calculatorRead a short story against the clock to get your words per minute, then turn any word count into reading time at your own speed.
- Time duration calculatorHours and minutes between two times, including shifts that cross midnight.
- Habit cost calculatorA $5.50 coffee on five weekdays is $1,430 a year and $14,300 over ten. Put in any habit you pay for and see its year.
Why none of these ask for your email
It runs on your device
The maths happens in your browser. There is no submit button because nothing is submitted.
No account
Open a tool, use it, close the tab. Your weight and your sleep stay where you typed them.
The cost: nothing is kept
You retype your numbers each visit. Saving them would mean storing them, and that is the wrong trade for a ten second answer.
The tracker is the part that remembers
To watch a number move over months you need a record. Free while in early access.
Start freeStart with three habits and one month.
You will know by the end of it whether this is the tracker that sticks. That is a shorter test than most things you have tried.