String Tension Lab Calculator

D'Addario · Pure Nickel · 11-14-18-27-37-48

D'Addario EPN115 (11-14-18-27-37-48) in Eb standard on a 28" scale

11-48 Medium, XL Pure Nickel Electric Guitar Strings on an electric guitar with a 28" scale, tuned to Eb standard (Eb4 Bb3 Gb3 Db3 Ab2 Eb2), pulls 131.2 lb59.5 kg583 N in total and 21.9 lb9.91 kg97 N per string on average. That is a tight feel for an electric guitar. The set is moderately uneven (spread 9.0%). String 5 (Ab2) deviates most: +13% from the set average.

Total tension
131.2 lb59.5 kg583 N
Average per string
21.9 lb9.91 kg97 N
Feel
tight
medium ≈ 17.1 lb7.76 kg76 N per string
Set your own preferred feel
Balance
moderately uneven
spread 9.0%

Tension per string

01020lb0510kg0255075100Nmedium (10-46)set average1Eb4.01121.1 lb9.56 kg94 N2Bb3.01419.1 lb8.68 kg85 N3Gb3.01820.0 lb9.07 kg89 N4Db3.02723.7 lb10.73 kg105 N5Ab2.03724.7 lb11.22 kg110 N6Eb2.04822.6 lb10.24 kg100 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
1Eb4311.1 .011PL011plain 21.1 lb9.56 kg94 N−4%
2Bb3233.1 .014PL014plain 19.1 lb8.68 kg85 N−12%
3Gb3185.0 .018PL018plain 20.0 lb9.07 kg89 N−9%
4Db3138.6 .027PNG027wound 23.7 lb10.73 kg105 N+8%
5Ab2103.8 .037PNG037wound 24.7 lb11.22 kg110 N+13%
6Eb277.8 .048PNG048wound 22.6 lb10.24 kg100 N+3%
Total131.2 lb59.5 kg583 N

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Similar sets in Eb standard, 28"

SetGaugesAvg per stringTotalFeelBalance
D'Addario EXL115 11-14-18-28-38-4921.0 lb9.52 kg93 N 125.9 lb57.1 kg560 Ntighteven
D'Addario NYXL1052 10-13-17-30-42-5221.4 lb9.70 kg95 N 128.2 lb58.2 kg570 Ntightuneven
D'Addario EXL140 10-13-17-30-42-5221.4 lb9.72 kg95 N 128.6 lb58.3 kg572 Ntightuneven
D'Addario EXL115BT 11-15-19-28-37-5021.8 lb9.90 kg97 N 130.9 lb59.4 kg582 Ntightvery even
EPN115 (this page) 11-14-18-27-37-4821.9 lb9.91 kg97 N 131.2 lb59.5 kg583 Ntightmoderately uneven
D'Addario NYXL1152 11-14-18-30-42-5222.8 lb10.33 kg101 N 136.6 lb62.0 kg608 Ntightuneven

Best match for a medium feel in Eb standard, 28"

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

  1. D'Addario EXL110BT 10-13.5-17-25-34-46 deviation 6.0%, average 18.0 lb8.18 kg80 N, very even
  2. D'Addario EPS510 10-13-17-26-36-46 deviation 6.1%, average 17.7 lb8.03 kg79 N, even; same gauges: NYXL1046, XSE1046, EXL110
  3. D'Addario EXL120 9-11-16-24-32-42 deviation 15.4%, average 15.1 lb6.86 kg67 N, moderately uneven; same gauges: NYXL0942

More for the EPN115

Other tunings on 28": E standard, Drop D, D standard, Drop C, C standard, B standard, Drop A, Open G, Open D, DADGAD

Eb standard on other scales: 24.75", 25", 25.5", 26.5", 27", 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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