D'Addario · XL Nickel Balanced Tension · 9-12-15-22-30-40

D'Addario EXL120BT (9-12-15-22-30-40) in E standard on a 25.5" scale

09-40 Super Light 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 79.6 lb36.1 kg354 N in total and 13.3 lb6.02 kg59 N per string on average. That is a loose feel for an electric guitar. The set is very even (spread 2.3%). String 5 (A2) deviates most: +5% from the set average.

Total tension: 79.6 lb36.1 kg354 N
Average per string: 13.3 lb6.02 kg59 N
Feel: loose; medium ≈ 17.1 lb7.76 kg76 N per string; Set your own preferred feel
Balance: very even; spread 2.3%

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	Tension	vs avg
1	E4	329.6	.009	PL009	plain	13.1 lb5.95 kg58 N	−1%
2	B3	246.9	.012	PL012	plain	13.1 lb5.95 kg58 N	−1%
3	G3	196.0	.015	PL015	plain	12.9 lb5.86 kg57 N	−3%
4	D3	146.8	.022	NW022	wound	13.3 lb6.04 kg59 N	+0%
5	A2	110.0	.030	NW030	wound	13.9 lb6.30 kg62 N	+5%
6	E2	82.4	.040	NW040	wound	13.2 lb5.99 kg59 N	−0%
Total						79.6 lb36.1 kg354 N

Open in the calculator

Similar sets in E standard, 25.5"

Set	Gauges	Avg per string	Total	Feel	Balance
EXL120BT (this page)	9-12-15-22-30-40	13.3 lb6.02 kg59 N	79.6 lb36.1 kg354 N	loose	very even
D'Addario EPS510	10-13-17-26-36-46	16.5 lb7.48 kg73 N	98.9 lb44.9 kg440 N	medium	even
D'Addario EXL110BT	10-13.5-17-25-34-46	16.8 lb7.62 kg75 N	100.8 lb45.7 kg448 N	medium	very even
D'Addario NYXL1046	10-13-17-26-36-46	17.1 lb7.74 kg76 N	102.4 lb46.4 kg455 N	medium	moderately uneven
D'Addario XSE1046	10-13-17-26-36-46	17.1 lb7.74 kg76 N	102.4 lb46.4 kg455 N	medium	moderately uneven
D'Addario EXL110	10-13-17-26-36-46	17.1 lb7.76 kg76 N	102.6 lb46.5 kg456 N	medium	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 EXL120BT

Other tunings on 25.5": Eb standard

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 EXL120BT (2026-10-31): unit weights derived from the published tensions, cross-checked across sets.