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When will you reach your goal?

Enter where you are and where you want to be. Get a realistic finish date, the weekly pace to aim for, and a four-phase plan you can actually follow.

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You can reach your goal by

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0 weeks · –

    How the Transformation Timeline works

    Most goal-weight calculators draw a straight line. Real bodies don’t work that way. This tool simulates your journey week by week, applying a weekly change as a percentage of your current body weight. That gives a more honest finish date than “lose 1 kg a week forever”.

    Three paces are available:

    • Gentle: about 0.5% of body weight per week when losing (0.15% when gaining). Easiest to stick to.
    • Steady: about 0.75% per week (0.25% when gaining). The best balance for most people.
    • Ambitious: about 1% per week (0.4% when gaining). Works short term, but needs tight habits.

    Your starting calories come from the Mifflin-St Jeor equation, adjusted for your activity level, minus (or plus) the energy needed for your chosen pace. We use the common estimate that one kilogram of body weight change is roughly 7,700 kcal. That number is a simplification, which is why the plan includes check-ins and adjustments.

    Why your plan has phases

    PeriodicFit is built on periodization: planning training and nutrition in blocks instead of doing the same thing every week. Your timeline is split into four phases:

    1. Foundation. The first quarter of your timeline. Build simple habits, learn the main lifts, and get your daily steps up. Small wins here make everything later easier.
    2. Build. The longest phase. You run a steady calorie deficit (or surplus) and progress your training block by block.
    3. Peak. The final stretch. Food choices get more precise, strength is protected, and many people benefit from a short diet break.
    4. Maintain. At least four weeks of slowly raising calories to maintenance. This is the phase most diets skip, and the reason so many people regain.

    How to use your result

    • Weigh in 3–7 times a week and track the weekly average. Daily numbers jump around by 1–2 kg because of water and salt.
    • Check in every two weeks. If your average is moving faster or slower than planned for two check-ins in a row, adjust calories by 100–200 kcal.
    • Keep protein high and lift weights. That is what makes the scale drop mostly fat, not muscle. Use the protein calculator to set a target.
    • Expect plateaus. A flat week is normal. Two to three flat weeks means it is time to adjust.

    Limitations

    This tool is for healthy adults. It doesn’t account for medical conditions, medications, pregnancy, or a history of disordered eating. If any of those apply, please speak with a doctor or a qualified dietitian before starting a diet. The finish date is a planning estimate, not a guarantee.

    (FAQ)

    Transformation Timeline: FAQ

    Still unsure? Ask a coach, it's free.

    06questions

    01How accurate is the goal date?

    It is an estimate based on a steady weekly change as a percentage of your body weight. Real progress moves in waves because of water, hormones and life events, so use it as a target, not a promise.

    02What is a safe rate of weight loss?

    For most adults, about 0.5–1% of body weight per week is a sustainable pace that helps you keep muscle. Faster loss usually means more muscle loss, more hunger and a higher chance of regaining weight.

    03Why does the timeline slow down near the end?

    The calculator applies your weekly pace to your current weight each week. As you get lighter, the same percentage is a slightly smaller number of kilograms.

    04Can I use it to gain weight or muscle?

    Yes. Enter a goal weight above your current weight. Gain rates are slower (about 0.15–0.4% of body weight per week) to keep fat gain low.

    05Why are calories capped at 1,200 or 1,500?

    Very low intakes make it hard to meet your nutrient needs. The tool will not suggest less than 1,200 kcal for women or 1,500 kcal for men. Below that, work with a professional.

    06What happens in the maintenance phase?

    You slowly raise calories back to maintenance while keeping your training. This phase teaches you to hold your new weight, which is where most diets fail.

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