D'Addario · XL Nickel Balanced Tension · 11-15-19-28-37-50

D'Addario EXL115BT (11-15-19-28-37-50) in E standard on a 25.5" scale

11-50 Medium Balanced Tension, XL Nickel Electric Guitar Strings on an electric guitar with a 25.5" scale, tuned to E standard (E4 B3 G3 D3 A2 E2), pulls 121.9 lb55.3 kg542 N in total and 20.3 lb9.21 kg90 N per string on average. That is a tight feel for an electric guitar. The set is very even (spread 2.6%). String 4 (D3) deviates most: +4% from the set average.

Total tension: 121.9 lb55.3 kg542 N
Average per string: 20.3 lb9.21 kg90 N
Feel: tight; medium ≈ 17.1 lb7.76 kg76 N per string; Set your own preferred feel
Balance: very even; spread 2.6%

Tension per string

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.

#	Note	Hz	Gauge	Item	Type	Tension	vs avg
1	E4	329.6	.011	PL011	plain	19.6 lb8.90 kg87 N	−3%
2	B3	246.9	.015	PL015	plain	20.5 lb9.31 kg91 N	+1%
3	G3	196.0	.019	PL019	plain	20.7 lb9.39 kg92 N	+2%
4	D3	146.8	.028	NW028	wound	21.1 lb9.58 kg94 N	+4%
5	A2	110.0	.037	NW037	wound	20.2 lb9.17 kg90 N	−0%
6	E2	82.4	.050	NW050	wound	19.7 lb8.94 kg88 N	−3%
Total						121.9 lb55.3 kg542 N

Open in the calculator

Similar sets in E standard, 25.5"

Set	Gauges	Avg per string	Total	Feel	Balance
D'Addario NYXL1149	11-14-18-28-38-49	19.5 lb8.84 kg87 N	116.9 lb53.0 kg520 N	tight	even
D'Addario EXL115	11-14-18-28-38-49	19.5 lb8.86 kg87 N	117.2 lb53.2 kg521 N	tight	even
D'Addario NYXL1052	10-13-17-30-42-52	19.9 lb9.03 kg89 N	119.4 lb54.2 kg531 N	tight	uneven
D'Addario EXL140	10-13-17-30-42-52	20.0 lb9.05 kg89 N	119.7 lb54.3 kg533 N	tight	uneven
EXL115BT (this page)	11-15-19-28-37-50	20.3 lb9.21 kg90 N	121.9 lb55.3 kg542 N	tight	very even
D'Addario EPN115	11-14-18-27-37-48	20.3 lb9.23 kg91 N	122.1 lb55.4 kg543 N	tight	moderately uneven

Best match for a medium feel in E standard, 25.5"

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

D'Addario EXL110BT 10-13.5-17-25-34-46 deviation 2.7%, average 16.8 lb7.62 kg75 N, very even
D'Addario EPS510 10-13-17-26-36-46 deviation 5.9%, average 16.5 lb7.48 kg73 N, even; same gauges: NYXL1046, XSE1046, EXL110
D'Addario NYXL1149 11-14-18-28-38-49 deviation 15.6%, average 19.5 lb8.84 kg87 N, even; same gauges: EXL115

More for the EXL115BT

Other tunings on 25.5": Drop D, Eb standard, D standard, Drop C, C standard, Open G, Open D, DADGAD

E standard on other scales: 24.75", 25", 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.

Sources

D'Addario product page, tension chart for EXL115BT (2026-10-31): unit weights derived from the published tensions, cross-checked across sets.