String Tension Lab Calculator

D'Addario · XL Nickel · 11-14-18-28-38-49

D'Addario EXL115 (11-14-18-28-38-49) in Drop D on a 24.75" scale

11-49 Medium, XL Nickel Electric Guitar Strings on an electric guitar with a 24.75" scale, tuned to Drop D (E4 B3 G3 D3 A2 D2), pulls 106.7 lb48.4 kg475 N in total and 17.8 lb8.07 kg79 N per string on average. That is a medium feel for an electric guitar. The set is moderately uneven (spread 11.0%). String 6 (D2) deviates most: −20% from the set average.

Total tension
106.7 lb48.4 kg475 N
Average per string
17.8 lb8.07 kg79 N
Feel
medium
medium ≈ 17.1 lb7.76 kg76 N per string
Set your own preferred feel
Balance
moderately uneven
spread 11.0%

Tension per string

05101520lb025810kg020406080Nmedium (10-46)set average1E4.01118.5 lb8.38 kg82 N2B3.01416.8 lb7.61 kg75 N3G3.01817.5 lb7.95 kg78 N4D3.02819.9 lb9.02 kg88 N5A2.03819.8 lb8.99 kg88 N6D2.04914.2 lb6.45 kg63 N
The bronze dashed line is the medium-feel target: the average per-string tension of a 10-46 set on a 25.5" scale in E standard (17.1 lb7.76 kg76 N). Loose and tight are measured against it.Line thickness follows the string gauge; textured lines are wound strings. Hover, tap or tab to a string for details.
#NoteHzGaugeItemType Tensionvs avg
1E4329.6 .011PL011plain 18.5 lb8.38 kg82 N+4%
2B3246.9 .014PL014plain 16.8 lb7.61 kg75 N−6%
3G3196.0 .018PL018plain 17.5 lb7.95 kg78 N−1%
4D3146.8 .028NW028wound 19.9 lb9.02 kg88 N+12%
5A2110.0 .038NW038wound 19.8 lb8.99 kg88 N+11%
6D273.4 .049NW049wound 14.2 lb6.45 kg63 N−20%
Total106.7 lb48.4 kg475 N

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Similar sets in Drop D, 24.75"

SetGaugesAvg per stringTotalFeelBalance
D'Addario NYXL1149 11-14-18-28-38-4917.7 lb8.05 kg79 N 106.4 lb48.3 kg473 Nmediummoderately uneven
EXL115 (this page) 11-14-18-28-38-4917.8 lb8.07 kg79 N 106.7 lb48.4 kg475 Nmediummoderately uneven
D'Addario NYXL1052 10-13-17-30-42-5218.1 lb8.19 kg80 N 108.4 lb49.2 kg482 Nmediumuneven
D'Addario EXL140 10-13-17-30-42-5218.1 lb8.22 kg81 N 108.7 lb49.3 kg483 Nmediumuneven
D'Addario EPN115 11-14-18-27-37-4818.5 lb8.39 kg82 N 110.9 lb50.3 kg493 Ntightmoderately uneven
D'Addario EXL115BT 11-15-19-28-37-5018.5 lb8.39 kg82 N 111.0 lb50.3 kg494 Ntightmoderately uneven

Best match for a medium feel in Drop D, 24.75"

Ranked by how close every string is to 17.1 lb7.76 kg76 N (lower deviation is better).

  1. D'Addario NYXL1149 11-14-18-28-38-49 deviation 11.9%, average 17.7 lb8.05 kg79 N, moderately uneven; same gauges: EXL115
  2. D'Addario EXL110BT 10-13.5-17-25-34-46 deviation 12.8%, average 15.3 lb6.93 kg68 N, moderately uneven
  3. D'Addario EXL115BT 11-15-19-28-37-50 deviation 13.0%, average 18.5 lb8.39 kg82 N, moderately uneven

More for the EXL115

Other tunings on 24.75": E standard, Eb standard, D standard, Drop C, Open G, Open D, DADGAD

Drop D on other scales: 25", 25.5", 26.5", 27", 28", 25.5"–27" multiscale

About these numbers

Tension is calculated, not measured: T = μ · (2 · L · f)², where μ is the string's mass per unit length (unit weight), L the vibrating length (scale) and f the pitch (A4 = 440 Hz, equal temperament). kg means kilogram-force: 1 kg ≈ 9.81 N ≈ 2.205 lb.

How a set feels also depends on the guitar's setup: action height, break angle over the nut and saddle, string length behind the nut and bridge, and your playing style. Plain strings feel stiffer than wound strings at the same tension. Use these figures to compare sets, not as an absolute measure of feel.

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