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

D'Addario EXL115BT (11-15-19-28-37-50) in Drop C on a 25.5"–27" multiscale scale

11-50 Medium Balanced Tension, XL Nickel Electric Guitar Strings on an electric guitar with a 25.5"–27" multiscale scale, tuned to Drop C (D4 A3 F3 C3 G2 C2), pulls 98.9 lb44.9 kg440 N in total and 16.5 lb7.48 kg73 N per string on average. That is a medium feel for an electric guitar. The set is moderately uneven (spread 8.3%). String 6 (C2) deviates most: −16% from the set average.

Total tension: 98.9 lb44.9 kg440 N
Average per string: 16.5 lb7.48 kg73 N
Feel: medium; medium ≈ 17.1 lb7.76 kg76 N per string; Set your own preferred feel
Balance: moderately uneven; spread 8.3%

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	Length	Tension	vs avg
1	D4	293.7	.011	PL011	plain	25.5"	15.6 lb7.06 kg69 N	−6%
2	A3	220.0	.015	PL015	plain	25.8"	16.7 lb7.56 kg74 N	+1%
3	F3	174.6	.019	PL019	plain	26.1"	17.2 lb7.81 kg77 N	+4%
4	C3	130.8	.028	NW028	wound	26.4"	18.0 lb8.15 kg80 N	+9%
5	G2	98.0	.037	NW037	wound	26.7"	17.6 lb7.98 kg78 N	+7%
6	C2	65.4	.050	NW050	wound	27"	13.9 lb6.32 kg62 N	−16%
Total							98.9 lb44.9 kg440 N

Open in the calculator

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

Similar sets in Drop C, 25.5"–27" multiscale

Set	Gauges	Avg per string	Total	Feel	Balance
D'Addario NYXL1149	11-14-18-28-38-49	15.8 lb7.18 kg70 N	95.0 lb43.1 kg422 N	medium	moderately uneven
D'Addario EXL115	11-14-18-28-38-49	15.9 lb7.20 kg71 N	95.2 lb43.2 kg424 N	medium	moderately uneven
D'Addario NYXL1052	10-13-17-30-42-52	16.2 lb7.35 kg72 N	97.2 lb44.1 kg432 N	medium	uneven
D'Addario EXL140	10-13-17-30-42-52	16.2 lb7.37 kg72 N	97.5 lb44.2 kg434 N	medium	uneven
EXL115BT (this page)	11-15-19-28-37-50	16.5 lb7.48 kg73 N	98.9 lb44.9 kg440 N	medium	moderately uneven
D'Addario EPN115	11-14-18-27-37-48	16.5 lb7.49 kg73 N	99.1 lb45.0 kg441 N	medium	uneven

Best match for a medium feel in Drop C, 25.5"–27" multiscale

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

D'Addario EXL115BT 11-15-19-28-37-50 deviation 8.8%, average 16.5 lb7.48 kg73 N, moderately uneven
D'Addario EXL115 11-14-18-28-38-49 deviation 12.5%, average 15.9 lb7.20 kg71 N, moderately uneven; same gauges: NYXL1149
D'Addario EPN115 11-14-18-27-37-48 deviation 12.7%, average 16.5 lb7.49 kg73 N, uneven

More for the EXL115BT

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

Drop C 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

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