Bulgarian Split Squat to Back Squat Calculator

Calculate estimated back squat load from Bulgarian split squat external load, or reverse it, using a 2.2×–3.0× multiplier in kg or lb.

Bulgarian Split Squat to Back Squat Estimator

Enter a value in one field to estimate the other (uses a heuristic multiplier)

Units

Assumption (multiplier)

Tip: You can also use the range (2.2×–3.0×) shown in the results.

Bulgarian Split Squat External Load (kg)

Example: if you hold 20 kg in each hand, enter 40 kg.

Back Squat Load (kg)

Results

Enter a value above and press Calculate.

Safety note: This calculator is a heuristic estimate and can vary widely by technique, depth, balance, equipment, and training background. Use conservative loading (often starting 10–20% below the estimate), progress gradually, and use safeties/spotters for back squats. Stop if you feel pain, dizziness, or unusual symptoms. If you have injuries, medical conditions, or are pregnant/postpartum, consult a qualified coach/clinician.

Bulgarian Split Squat to Back Squat Estimation Formula

The formula below provides a rough estimate of a comparable Back Squat load (BS) from a Bulgarian Split Squat external load (BSS). Because unilateral-to-bilateral transfer varies a lot between lifters, a range is more appropriate than a single fixed “equivalence.”

BS \approx BSS \times M,\quad M \approx 2.2\text{ to }3.0

Variables:

BS is the Back Squat load
BSS is the Bulgarian Split Squat total external load (barbell + plates, or both dumbbells combined; not bodyweight)
M is the multiplier (a rough assumption; commonly a mid-point like 2.6× is used)

To estimate Back Squat load, multiply your BSS external load by a multiplier M (often treated as ~2.2–3.0). To estimate BSS from a known Back Squat load, divide the Back Squat load by M.

Bulgarian Split Squat to Back Squat Estimate Table (kg, mid-point multiplier = 2.6×, rounded to nearest 2.5 kg)
Bulgarian Split Squat External Load (kg)	Estimated Back Squat Load (kg)
10	25
12.5	32.5
15	40
17.5	45
20	52.5
22.5	57.5
25	65
27.5	72.5
30	77.5
32.5	85
35	90
37.5	97.5
40	105
45	117.5
50	130
55	142.5
60	155
70	182.5
80	207.5
90	235
Illustrative mid-point estimate using 2.6×. Individual results can vary; use the calculator’s range (2.2×–3.0×) for a broader estimate.

How to Calculate Your Estimate

Follow these simple steps:

Determine the total external load you use for Bulgarian Split Squats (barbell + plates, or both dumbbells combined) or your Back Squat load.
Pick an assumption multiplier (M). A common rough range is about 2.2×–3.0× (mid-point ~2.6×).
If starting from Bulgarian Split Squat load, estimate: Back Squat ≈ BSS × M.
If starting from Back Squat load, estimate: BSS ≈ Back Squat ÷ M.
Use the calculator above to compare a mid-point estimate and a range.

Example:

If your Bulgarian Split Squat external load is 50 kg (for example, 25 kg in each hand), then:

Estimated Back Squat range ≈ 50 × (2.2 to 3.0) = 110 to 150 kg (mid-point using 2.6× is 130 kg)