StrongLifts 5x5 Calculator
The formula
What the 5x5 climb tells you
Mehran’s classic: three full-body sessions, 5×5 on the big three, +2.5 kg whenever the reps come clean.
Calculation: 5×5 workload = 25 reps × load; +2.5 kg per squat session. Enter your inputs and every substitution is shown below the result.
Reading the result
The entire program is one arithmetic sequence with a stall detector; the calculator is its graph.
Rules of thumb: Untrained men add 60–80 kg to the squat in six months on this line
Limitations and best practice
5×5 stops being linear around the 1.5× bodyweight squat for most lifters — that is when the app’s “reset” advice matters.
This calculator gives an estimate based on standard formulas; it is not professional financial, medical, legal or engineering advice. Verify anything you plan to act on with a qualified professional and your own records.
Frequently asked questions
Why 5x5 and not 3x5?
What about rows?
Source & methodology
StrongLifts 5x5 published protocol.
How StrongLifts 5x5 works — and what your result really means
This page was written for one job: turning your own inputs into a defensible figure, with the working shown. StrongLifts 5x5 is the kind of number people argue about from memory. This page ends that argument with arithmetic you can watch happen: enter your figures, get End working weight in real time, and see every substitution printed below.
There is a habit that separates people who get useful answers from Strength Training numbers: they decide what question the figure answers before they compute it. StrongLifts 5x5 answers “End working weight?” — and nothing else, which is precisely why the result is trustworthy.
What makes StrongLifts 5x5 worth calculating is not precision but position: it tells you which side of a threshold you are on, and by how much. A rough figure that settles the direction beats an elaborate one that never commits.
Every figure in the prose is generated by the engine rather than written beside it — the worked example resolves to end working weight = 215.0 kg on the default inputs, and the sensitivity section ranks the inputs that move the result — Squat 5x5 working first, at ≈8.1 % of the headline for a ten-percent error either way in that input. Read the sections in order and you will be able to reproduce every figure by hand.
Inside the StrongLifts 5x5 calculation: formula and every input
One formula, published in full: 5×5 workload = 25 reps × load; +2.5 kg per squat session. Anything you can read, you can reproduce in a spreadsheet, and that reproducibility is the whole point of printing it rather than hiding it behind a button.
Squat 5x5 working (kg) (example value 175) is a quantity rather than a category — precision here is cheap and worth having. Stay in one unit system top to bottom; conversion rounding is where small errors enter.
Weeks run (example value 11) is a measured number in the unit named by the label; the formula does not convert for you. Use the value as of today, not as of the last time you looked — time fields drift silently.
The default StrongLifts 5x5 calculation, written out in full
Abstract formulas are hard to trust, so here is the complete substitution using the default inputs, written the way an examiner would want it. Starting figures: Squat 5x5 working (kg), Weeks run. The endpoint of that chain is 215.0 kg of end working weight, sitting in the “From 175 kg the squat line reaches 215 kg in 11 weeks; one session’s 5×5 volume alone is 4,375 kg moved” band.
- Sessions = 11 × 3; squat trains every other session
- Bar climbs +2.5 kg per squat session
- End = 175 + 2.5 × 16 = 215.0
Session volume now — 4,375 kg. Read next to the headline, this is the figure that shows the shape of the trade-off.
Session volume at end — 5,375 kg. This is the number experienced users quote when the headline alone would mislead.
Est. 1RM at end — 243.0 kg. Read next to the headline, this is the figure that shows the shape of the trade-off.
Stall rule — repeat the weight until 5×5 clears. If your inputs change, this is usually the first companion figure to move.
Keep this worked example open while you enter your own figures: matching the shape of the substitution is the fastest way to spot a unit or convention mistake.
Scenario table: StrongLifts 5x5 at ±10 % and ±20 % of the key input
Read this table as the practical error bar on the headline figure. It answers the question people actually have after seeing a single number: how wrong could this be if the main input is off by ten or twenty percent?
| Squat 5x5 working setting | End working weight |
|---|---|
| 80 % of the example value | 180.0 kg |
| 90 % of the example value | 197.5 kg |
| example inputs | 215.0 kg |
| 110 % of the example value | 232.5 kg |
| 120 % of the example value | 250.0 kg |
That spread — 180.0 kg at the low end, 250.0 kg at the high — is what a careful read of StrongLifts 5x5 looks like: a band you can state out loud, with the reason for each edge. Reproduce it in the form above by editing Squat 5x5 working alone; the substitution steps will follow your figures exactly.
Where StrongLifts 5x5 is fragile — and where it is not
Nobody should have to guess which input matters. The engine was re-run once per field below — ten percent up, ten percent down, everything else frozen — and the results ranked by how far they moved the end working weight. Read it as a map of where StrongLifts 5x5 is fragile — drawn for the example inputs, which is the map you want when deciding what to measure carefully.
- Nudge Squat 5x5 working by ±10 % and StrongLifts 5x5 lands between 197.5 kg and 232.5 kg (sensitivity ≈8.1 %)
- Weeks run +10 % → StrongLifts 5x5 = 220.0 kg · −10 % → 210.0 kg (the end working weight shifts ≈2.3 %)
Squat 5x5 working is the dominant lever here: ten percent either way moves the result by about 8.1 %, from 197.5 kg to 232.5 kg. Measure that input from a document rather than from memory, and treat Weeks run as the second priority (≈2.3 % per ten percent). The remaining fields can sit at safe defaults without materially changing the answer — knowing which is which is what separates a careful calculation from an anxious one.
What a StrongLifts 5x5 of 215.0 kg means in practice
A number on its own is trivia; a number against a range is intelligence. The verdict attached to the default calculation — “From 175 kg the squat line reaches 215 kg in 11 weeks; one session’s 5×5 volume alone is 4,375 kg moved” — is one band on a ladder your own figure may sit somewhere else on. Before treating the band as fact, note its width: ten percent either way on Squat 5x5 working already spans 197.5 kg to 232.5 kg. The practical reading rules: ask what would have to change to move you one band. If the answer is “a small, plausible input difference”, the band itself is not the finding — the uncertainty is.
In Fitness & Sports, StrongLifts 5x5 is one instrument in an orchestra: on its own it is a number, next to Session volume now and Session volume at end it becomes a diagnosis. The tools linked above exist so the headline never has to carry that weight alone.
Why StrongLifts 5x5 results go wrong — and how to prevent it
5×5 stops being linear around the 1.5× bodyweight squat for most lifters — that is when the app’s “reset” advice matters. This calculator gives an estimate based on standard formulas; it is not professional financial, medical, legal or engineering advice. Verify anything you plan to act on with a qualified professional and your own records.
Reporting the headline and quietly discarding Session volume now. The companions are where the shape of the trade-off survives the rounding.
This model has its own particular trap: Squat 5x5 working carries ≈8.1 % of the response per ten percent of error, so effort spent elsewhere is largely decorative.
The subtlest error is answering the wrong question precisely. Confirm that end working weight is actually the quantity your decision needs — the arithmetic is flawless either way, which is what makes the mistake invisible.
Before you trust your StrongLifts 5x5: a short checklist
- Recompute once with the dominant input deliberately set low, and see whether the decision changes.
- Confirm the example values are plausible for your own situation before replacing them.
- Re-verify Squat 5x5 working against a source document — ten percent of error there moves the headline by ≈8.1 %.
- Verify each input against its original source document, not memory.
- Re-run the calculation with a ±10 % stress on the two most sensitive inputs.
- Repeat the ±10 % test on the inputs that matter and see whether the decision — not just the number — still holds.
Five steps from raw inputs to a figure you can defend
The tool does the arithmetic; the routine below is what makes the arithmetic trustworthy. Five steps, a minute total — and afterwards you will know not just what the number is, but which assumption produced it.
Step 1 — collect, then type. Everything this tool asks for is listed above (squat 5x5 working (kg), weeks run). Pull each figure from something you can point at — paperwork, a dashboard, a label — before touching a field. Guesswork at the input stage cannot be repaired at the interpretation stage. Most surprises in numbers are surprises about inputs, not about formulas.
Step 2 — compute the version you would not be embarrassed by. If a stranger audited your inputs, which set would you hand over? Enter that set, read the result, and treat everything else as upside. If the verdict changes with a ten-percent nudge, report the nudge alongside the number.
Step 3 — isolate your variables. Change one field, observe, revert. The live sensitivity list does the ranking for the default inputs; verify it against your own, because dominance shifts when the starting point shifts. The fastest sanity test is to guess the answer first and see how far the calculation disagrees.
Step 4 — stress before you commit. A decision that survives a ten-percent squeeze on its two biggest inputs needs no luck to be sound. One that does not survive is a decision about hope, not about arithmetic. If a result feels obviously right, that is the moment to check the inputs hardest.
Step 5 — schedule the next run. In Fitness & Sports the inputs drift quietly. Put a reminder a quarter out, re-enter the same fields, and read the change rather than the level. Note the assumption you are least sure about; that is where the real risk lives.
From calculation to decision: where StrongLifts 5x5 earns its keep
Numbers earn their keep in conversations, and StrongLifts 5x5 is no exception. In Fitness & Sports discussions around Strength Training, this figure decides whether an option stays on the table: it converts an opinionated debate into an arithmetic one, and arithmetic is the only referee both sides accept. If the verdict changes with a ten-percent nudge, report the nudge alongside the number.
The audience for this page is people who need one trustworthy number before their next decision. In professional Strength Training practice the pattern is always the same — screen with StrongLifts 5x5, then invest slow analysis only in whatever survives the screen. The fastest sanity test is to guess the answer first and see how far the calculation disagrees.
There is a personal-administration use people overlook: periodic self-checking. StrongLifts 5x5 quietly drifts as life changes — rates move, bodies change, costs compound — and re-running it a few times a year catches drift while correction is still cheap. If a result feels obviously right, that is the moment to check the inputs hardest.
The questions that come up most about StrongLifts 5x5
What affects StrongLifts 5x5 the most?
Measured on this engine, Squat 5x5 working is the dominant lever: moving it ±10 % shifts the end working weight across 197.5 kg to 232.5 kg — about 8.1 % of the headline, with Weeks run next at ≈2.3 %. The ranked list in the sensitivity section is computed live, not asserted from a template.
Which matters more: weeks run or squat 5x5 working?
Squat 5x5 working, by a factor of about 3.5. Concretely: ten percent on Squat 5x5 working is worth ≈8.1 % of StrongLifts 5x5, the same nudge on Weeks run only ≈2.3 %. That ranking is re-computed for each page from that page’s own defaults.
What is a typical StrongLifts 5x5?
With the example inputs on this page the result is 215.0 kg, labelled “From 175 kg the squat line reaches 215 kg in 11 weeks; one session’s 5×5 volume alone is 4,375 kg moved”. “Typical” varies with situation, which is why every result here ships with its verdict band and its sensitivity list: they turn one figure into a range you can locate yourself inside.
How do I calculate StrongLifts 5x5 by hand?
Use the stated model — 5×5 workload = 25 reps × load; +2.5 kg per squat session — and substitute in the order the tool prints (it starts from Sessions = 11 × 3; squat trains every other session). On the example inputs the hand route lands on 215.0 kg, exactly what the calculator shows. A spreadsheet reproduces it in two or three cells; doing it once by hand is what makes the automated answer trustworthy.
What happens to StrongLifts 5x5 if squat 5x5 working changes by 10 %?
On these inputs a ±10 % change in squat 5x5 working takes StrongLifts 5x5 to 232.5 kg against the 215.0 kg example — around 8.1 % of the headline. The same test on every other field is in the sensitivity section.
Is the StrongLifts 5x5 result of 215.0 kg good or bad?
Neither, on its own — the label “From 175 kg the squat line reaches 215 kg in 11 weeks; one session’s 5×5 volume alone is 4,375 kg moved” is the band this figure falls in for the example inputs, and your own inputs will place you elsewhere on the same ladder. Judge the number against your history and your alternatives, and remember that a ten-percent error in Squat 5x5 working alone moves it by ≈8.1 %.
Can StrongLifts 5x5 be negative or empty?
Yes, and that is informative rather than broken: a negative StrongLifts 5x5 usually means the inputs encode an outflow or a shortfall, and the verdict band above labels exactly that situation instead of hiding it.
How do I calculate StrongLifts 5x5 manually?
Write down the inputs, then follow the printed steps in order — 5×5 workload = 25 reps × load; +2.5 kg per squat session. A spreadsheet replicates it with two or three cells. The manual route is worth doing once to build intuition; after that the calculator saves time and eliminates transcription slips.
Why 5x5 and not 3x5?
Twenty-five quality reps per exercise is the hypertrophy-strength seam the program sells.
What about rows?
5×5 on rows too — the pulls follow the same ladder.
Can this tool see the numbers I type?
It cannot. There is no submission step: the calculation happens in your browser and the result disappears when you close the page. Treat the fields above as a scratchpad rather than a form.
Key terms on this page
- Session volume now
- 4,375 kg on the example inputs — a companion figure printed beside the headline of StrongLifts 5x5 so that no result is read in isolation.
- Session volume at end
- 5,375 kg for the StrongLifts 5x5 worked case; it sits next to the main result because it carries context the headline leaves out.
- Est. 1RM at end
- 243.0 kg in the default StrongLifts 5x5 calculation — one of the secondary figures an experienced reader checks before trusting the primary number.
- End working weight
- The primary output of this tool: 215.0 kg for the default inputs, computed exactly from 5×5 workload = 25 reps × load; +2.5 kg per squat session.
- Worked example
- The step-by-step substitution printed above, so the arithmetic can be re-derived by hand or in a spreadsheet.
- Verdict band
- A named zone on the range of plausible results; the example inputs land in “From 175 kg the squat line reaches 215 kg in 11 weeks; one session’s 5×5 volume alone is 4,375 kg moved”, and your inputs may not.
- Sensitivity (±10 %)
- How far the StrongLifts 5x5 moves when a single input is nudged ten percent either way; the ranked list on this page is computed live from this engine.
Where the StrongLifts 5x5 model comes from
The model is published arithmetic implemented exactly as written: 5×5 workload = 25 reps × load; +2.5 kg per squat session. Source of record: StrongLifts 5x5 published protocol. Where a professional version of this calculation differs, it differs in inputs and jurisdiction-specific coefficients, not in the algebra — which is why re-checking your inputs beats hunting for a second calculator.
This page is an estimation aid, not professional advice. The design rule is simple: two people entering identical figures must get identical answers. The design constraint was set by usefulness rather than by comfort: an estimate you can interrogate beats an answer you have to trust.
Turning this StrongLifts 5x5 into a decision
Save the number together with its inputs and today’s date; a StrongLifts 5x5 figure without context is unusable the moment an input changes.
This page was written for people who need one trustworthy number before their next decision, and the promise is that nothing above required trust. Bookmark the tool, re-run it whenever an input moves by more than a few percent, and keep the date with the number.