BakkerElkhuizen S-board 840 Numeric — Keypad and Calculator
Calculator modeSend button19 mm pitchScissor keys
This is the number pad for people who still keep a calculator next to the keyboard. The S-board 840 Numeric is both: a full numeric keypad for data entry, and a working desk calculator with eight arithmetic function keys, so the sum happens on the pad instead of on a separate device you then re-type from. The detail that makes it more than a gimmick is the Send button: it transfers the calculation straight into the computer, which removes the step where a figure is read off one screen and typed into another. BakkerElkhuizen describes it as an ergonomic numeric keyboard suitable for users who work intensively with data input, and the build follows the same rules as the rest of the range — a 19 mm key centre distance in line with the DIN EN ISO norm, a scissor mechanism, and anti-reflective white keys with dark lettering at a 4 mm font size. The number keys are concave; the calculator function keys are convex, so your fingers can tell the two groups apart without looking.
Compatibility — check before buying:
Two practical points. First, placement: paired with a compact keyboard this pad shortens the reach to the mouse, and because it stands alone it can go on the left or the right — BakkerElkhuizen makes the point that alternating sides helps distribute the muscle activity between both hands. Second, the operating systems. The pad connects by USB plug and play and BakkerElkhuizen publishes Windows systems with a USB port for full function, while stating specifically that the calculator function works on macOS — so a Mac user gets the calculator, but we will not promise the rest of the behaviour, because the manufacturer does not. Tell us your machine and we will test a unit before shipping. Beyond the digits you also get integrated navigation keys — Home, Page Up, Page Down, End, Insert and Delete — and two LEDs, one for power and one for NumLock. On the gaps: BakkerElkhuizen states no dimensions, no weight and no cable length for this model, so we quote none.
Best For
✓ Bookkeeping and invoice entry
✓ Anyone who keeps a separate calculator on the desk
✓ Compact and tenkeyless keyboard users
✓ Left-handed users, or anyone alternating sides
✓ Sites buying to an ergonomic standard
✓ Laptop users with no number pad
Key Features
A calculator that talks to the PC
Eight arithmetic keys and a Send button that puts the result into the computer, so nothing is read off one screen and typed into another.
Two key shapes, one hand
Concave number keys and convex calculator keys, so the two groups are told apart by feel rather than by looking down.
Built to the norm
19 mm key centre distance in line with DIN EN ISO, with a scissor mechanism — a full-size stroke in a pad-sized footprint.
Either side of the keyboard
A standalone pad can move to the left hand, which BakkerElkhuizen recommends to spread the muscle activity between both hands.
Technical Specifications
| Identification |
| Brand |
BakkerElkhuizen |
| Series |
S-board 840 Numeric |
| Part Number |
BNES840DNUM |
| EAN / GTIN |
8717399991001 |
| MPN |
BNES840DNUM |
| Keys |
| Key centre distance |
19 mm, in line with DIN EN ISO |
| Number keys |
Concave |
| Calculator function keys |
Convex, eight keys |
| Mechanism |
Scissor |
| Font size |
4 mm |
| Finish |
Anti-reflective white keys, dark lettering |
| Navigation keys |
Home, Page Up, Page Down, End, Insert, Delete |
| Function and connection |
| Modes |
Numeric input and calculator |
| Send button |
Transfers the calculation to the computer |
| Connection |
USB, plug and play |
| Compatibility |
Windows systems with a USB port |
| macOS |
Calculator function works, per BakkerElkhuizen |
| Indicators |
Two LEDs, power on/off and NumLock |
| Undisclosed |
| Dimensions |
Not stated by BakkerElkhuizen |
| Weight |
Not stated by BakkerElkhuizen |
| Cable length |
Not stated by BakkerElkhuizen |
| Warranty |
| Warranty |
1-Year Warranty (Singular) |
| Manufacturer Term |
BakkerElkhuizen publishes a 3-year guarantee on electronic products, extending to 5 years after product registration. Singular’s direct warranty is 1 year; beyond that we handle the claim with BakkerElkhuizen on your behalf. |
Frequently Asked Questions
Is the calculator real, or just a NumLock trick?
Real. There are eight arithmetic function keys with their own convex key tops, and a Send button that transfers the result into the computer rather than leaving it on the pad.
Does it work on a Mac?
BakkerElkhuizen publishes Windows for full function and states specifically that the calculator function works on macOS. We will not promise more than that. Tell us your machine and we will test a unit first.
How is it different from the UltraBoard 955 Numeric?
The 955 Numeric is a plain pad with four hotkeys. The S-board 840 Numeric adds calculator mode, the eight function keys and the Send button. Everything else — 19 mm pitch, scissor keys — is the same idea.
Singular Expert Insight
The Send button is the part that earns its keep: a desk calculator you have to re-type from is a transcription error waiting to happen, and this removes that step entirely. Note the honest macOS wording — the calculator works, the rest is not stated. See our
keyboard accessories and our
keyboards.
Buyer’s Guide
Buy it if
You enter figures all day, you still use a calculator, and you want both on one pad that can sit on either side.
Skip it if
You only need digits, you are on macOS and need full function, or you want a wireless pad.
Also consider
The BakkerElkhuizen UltraBoard 955 V2 Numeric for a plain pad, or a compact keyboard to pair it with.
