String Tension Lab Calculator

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

D'Addario EXL115 (11-14-18-28-38-49) in D standard on a 25.5"–27" multiscale scale

11-49 Medium, XL Nickel Electric Guitar Strings on an electric guitar with a 25.5"–27" multiscale scale, tuned to D standard (D4 A3 F3 C3 G2 D2), pulls 98.7 lb44.8 kg439 N in total and 16.5 lb7.46 kg73 N per string on average. That is a medium feel for an electric guitar. The set is moderately uneven (spread 8.4%). String 2 (A3) deviates most: −12% from the set average.

Total tension
98.7 lb44.8 kg439 N
Average per string
16.5 lb7.46 kg73 N
Feel
medium
medium ≈ 17.1 lb7.76 kg76 N per string
Set your own preferred feel
Balance
moderately uneven
spread 8.4%

Tension per string

05101520lb02468kg020406080Nset averagemedium (10-46)1D4.01115.6 lb7.06 kg69 N2A3.01414.5 lb6.57 kg64 N3F3.01815.5 lb7.02 kg69 N4C3.02818.0 lb8.15 kg80 N5G2.03818.3 lb8.30 kg81 N6D2.04916.9 lb7.67 kg75 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 Length Tensionvs avg
1D4293.7 .011PL011plain 25.5" 15.6 lb7.06 kg69 N−5%
2A3220.0 .014PL014plain 25.8" 14.5 lb6.57 kg64 N−12%
3F3174.6 .018PL018plain 26.1" 15.5 lb7.02 kg69 N−6%
4C3130.8 .028NW028wound 26.4" 18.0 lb8.15 kg80 N+9%
5G298.0 .038NW038wound 26.7" 18.3 lb8.30 kg81 N+11%
6D273.4 .049NW049wound 27" 16.9 lb7.67 kg75 N+3%
Total98.7 lb44.8 kg439 N

Open in the calculator

Multiscale (fanned frets): string lengths change linearly from 25.5" (treble) to 27" (bass).

Similar sets in D standard, 25.5"–27" multiscale

SetGaugesAvg per stringTotalFeelBalance
D'Addario NYXL1149 11-14-18-28-38-4916.4 lb7.44 kg73 N 98.4 lb44.6 kg438 Nmediummoderately uneven
EXL115 (this page) 11-14-18-28-38-4916.5 lb7.46 kg73 N 98.7 lb44.8 kg439 Nmediummoderately uneven
D'Addario NYXL1052 10-13-17-30-42-5216.8 lb7.64 kg75 N 101.1 lb45.8 kg450 Nmediumuneven
D'Addario EXL140 10-13-17-30-42-5216.9 lb7.66 kg75 N 101.3 lb46.0 kg451 Nmediumuneven
D'Addario EXL115BT 11-15-19-28-37-5017.1 lb7.75 kg76 N 102.5 lb46.5 kg456 Nmediumeven
D'Addario EPN115 11-14-18-27-37-4817.2 lb7.79 kg76 N 103.0 lb46.7 kg458 Nmediumuneven

Best match for a medium feel in D standard, 25.5"–27" multiscale

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

  1. D'Addario EXL115BT 11-15-19-28-37-50 deviation 4.6%, average 17.1 lb7.75 kg76 N, even
  2. D'Addario NYXL1149 11-14-18-28-38-49 deviation 8.9%, average 16.4 lb7.44 kg73 N, moderately uneven; same gauges: EXL115
  3. D'Addario EPN115 11-14-18-27-37-48 deviation 12.1%, average 17.2 lb7.79 kg76 N, uneven

More for the EXL115

Other tunings on 25.5"–27" multiscale: E standard, Drop D, Eb standard, Drop C, C standard, Open G, Open D, DADGAD

D standard on other scales: 24.75", 25", 25.5", 26.5", 27", 28"

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.

Sources