Dining table
4-Seater Dining Table
DIY blueprint for 4-Seater Dining Table.
Dimensions
Width (W)
1400mm
Depth (D)
800mm
Height (H)
720mm
Cut list
Tools you'll need
- ✓
Measuring Tape (5m or longer)
Used for measuring each part.
- ✓
Pencil and Carpenter's Square
For marking lines and checking right angles.
- ✓
Saw
Using a home center's cutting service is recommended.
- ✓
Electric Screwdriver
An impact driver improves work efficiency.
- ✓
Sandpaper
Prepare two types: #120 and #240.
- ✓
Level
Essential for checking horizontality during assembly.
- ✓
Clamp (2 or more)
Used for temporary fixing during joining.
- ✓
Brush and Paint Tray
Used for oil or varnish finishing.
Materials
Build steps
- 1
Measurement and Installation Space Confirmation
≈ 15 minMeasure the installation location for the 4-person dining table (1400×800×720mm). Confirm the front and back clearance space when chairs are pulled out (chair depth + at least 400mm) and ensure the smooth path for dish arrangement.
MeasureW 1400 mmMeasureSTEP 1 / 12Tip
- For a typical dining style, allow approximately 600mm width × 400mm depth per person.
- A table height of 720mm is based on a standard dining chair seat height (420mm) plus a 300mm difference.
- Maintain at least 800mm distance to the wall to allow chairs to be pulled out.
Watch out
- 1200×700mm tabletops are standard for 4-person seating but may feel cramped for families serving large dishes.
- Overlooking the chair backrest thickness during measurement can result in impossible seating arrangements.
- 2
Cut List Preparation and Home Center Ordering
≈ 40 minPrepare 10 pieces of 2×6 lumber for the tabletop (38×140×1400mm), 4 legs (38×89×682mm), 2 long side aprons (38×89×1324mm), and 2 short side aprons (38×89×724mm) from 2×4 lumber. Prepare 60 coarse-thread screws 75mm. Using the home center's cutting service is convenient.
CutUse the in-store cut serviceCutSTEP 2 / 12Tip
- 2×6 lumber actual dimensions are 38×140mm; note that nominal and actual sizes differ.
- Arranging 9 boards at 140mm width each yields 1260mm; with 3mm gaps between each, total width becomes 1284mm.
- The effective tabletop width is 9 boards ×140mm plus 8 gaps ×3mm = 1284mm, which exceeds the desired 1400mm width, so adjusting number of boards or width is necessary.
Watch out
- Selecting warped or twisted 2×6 boards causes a wavy tabletop; visually inspect each board at purchase.
- Leg length 682mm is calculated as table height 720mm minus tabletop thickness 38mm; give cutting instructions in actual dimensions to avoid errors.
- 3
Sanding of All Parts
≈ 50 minSand sequentially with #120, #180, then #240 grit sandpapers. For the tabletop 2×6 lumber, sand especially carefully. Repeatedly wipe the surface with a damp cloth to raise the grain, let dry completely, then finish with #240 to reduce stain absorption during meals.
Sand#120 → #180SandSTEP 3 / 12Tip
- Since the dining surface contacts food, no splinters or burrs are allowed; feel the surface with the finger pads.
- The 'wet sanding' process of wiping wet and drying before further sanding reduces raised grain after finishing.
- Using an orbital sander can save time; consider rental services.
Watch out
- Forgetting to chamfer edges can cause fabric and skin snags, especially at child head height.
- Sanding produces a lot of dust; perform sanding in ventilated spaces such as balconies or garages.
- 4
Temporary Assembly of Legs and Aprons (Frame Creation)
≈ 45 minPosition the long and short side aprons 50mm down from the top end of the 4 leg pieces. Attach aprons on the outside of the legs, driving 2 coarse-thread screws 75mm per joint. A rectangular frame means success. Always confirm right angles at all corners using a carpenter's square.
Build the frameTighten joints firmlyAssembleSTEP 4 / 12Tip
- Strength varies depending on whether aprons are attached outside or inside the legs; outside attachment improves appearance, inside gives more board contact.
- Drill 5mm pilot holes in the aprons before screwing to prevent wood splitting in the legs.
- Right angle accuracy at joints directly affects tabletop fitting.
Watch out
- Driving 75mm screws without pilot holes easily splits 2×4 lumber.
- Not aligning leg grain and knots results in uneven appearance.
- 5
Frame Right Angle and Diagonal Check
≈ 15 minPlace the assembled frame on a flat floor and confirm all four legs touch the floor (check for wobble). Measure the diagonal lengths (inside dimensions) with a tape measure ensuring the difference is within 2mm. If misaligned, loosen screws and correct diagonals by clamping, then retighten.
InspectNo wobble ✓InspectSTEP 5 / 12Tip
- Measurements are inaccurate on uneven floors; work on a flat surface.
- If diagonal difference exceeds 5mm, tabletop will rest crookedly; ensure within 2mm.
- Wobble means only one leg is off the floor; adjust until all four legs sit evenly.
Watch out
- Proceeding with distortions leads to warped or misaligned tabletops.
- Cheap carpenter's squares may be off by more than 0.5°, affecting accuracy.
- 6
Tabletop Assembly
≈ 40 minArrange 9 pieces of 2×6 lumber for the tabletop on a workbench, aligning grain direction. Insert 3mm thick disposable chopsticks between boards to create gaps for wood expansion. Attach two 2×4 reinforcing battens on the back side with wood glue and 45mm coarse-thread screws to unify the tabletop.
Build the frameTighten joints firmlyAssembleSTEP 6 / 12Tip
- Alternate grain orientation by reversing the core side of boards to counterwarp and reduce cracking.
- Position battens 200mm inside from the tabletop edges for appearance; avoid placing at edges.
- Confirm screw length of 45mm does not penetrate the 38mm board thickness; always measure actual lengths.
Watch out
- Fitting boards tightly without gaps causes swelling and warping due to moisture; always allow 3mm breathing space.
- Skewed batten installation causes distortion of the entire tabletop; verify right angle with a square.
- 7
Fixing Tabletop to Frame
≈ 30 minPlace the tabletop on the frame, confirming balanced overhangs around 30mm on all sides. Drill 5mm pilot holes from the aprons upward into the tabletop back, then secure with 75mm coarse-thread screws. Use 4 screws from each long apron and 2 from each short apron, for a total of 12 screws.
Build the frameTighten joints firmlyAssembleSTEP 7 / 12Tip
- Overhangs of 30-50mm do not interfere with dining actions.
- Drive screws toward the inner side of the aprons, not the centerline, to reduce wood splitting.
- Screw length should not exceed apron thickness plus 20mm to avoid protrusion.
Watch out
- Directly driving 75mm screws without pilot holes and countersinking can cause screw heads to protrude.
- Overhangs larger than 50mm cause tabletop sagging; about 30mm is ideal.
- 8
Surface Preparation for Finishing
≈ 20 minBefore finishing, lightly sand the entire table with #240 sandpaper again and remove dust with a damp cloth. For indoor use, use water-based urethane varnish, Watco oil, Briwax, etc. Use finishes labeled 'conforms to Food Sanitation Act' for surfaces contacting food for safety.
Sand#240SandSTEP 8 / 12Tip
- Matte or semi-gloss water-based urethane varnish provides strong water and heat resistance, suitable for dining.
- Watco oil preserves natural wood texture and offers a soft finish.
- Always test paint on scrap wood to confirm color before applying.
Watch out
- Glue spots repel finish; sand with #240 beforehand.
- Applying finish over residual dust results in rough surfaces; clean thoroughly.
- 9
First Coat of Finish
≈ 40 minApply finish evenly with a brush in the order: tabletop, aprons, legs, then underside. Brush along the wood grain in one direction without leaving brush marks. Water-based urethane varnish needs about 3 hours drying; Watco oil requires 15-20 minutes soaking then wiping off excess and 2 hours drying.
PaintWatco oil / varnishPaintSTEP 9 / 12Tip
- Thin coats and two coats are standard for urethane varnish; thick coats cause bubbles and shrinkage.
- Always wipe excess Watco oil to avoid sticky finish after drying.
- Dry in a dust-free area.
Watch out
- Applying varnish in a thick, sticky state causes drips and uneven drying.
- Forced drying with heating and wind causes surface curing and internal wetness, leading to defects.
- 10
Sanding Between Coats and Second Coat
≈ 40 minOnce the first coat is fully dry, lightly sand surface using fine #400 sandpaper to remove raised grain. Remove dust and apply the second coat thinner than the first. For three coats to build a thick film, repeat sanding once more between coats.
PaintWatco oil / varnishPaintSTEP 10 / 12Tip
- Sanding between coats lightly removes only surface fuzz raised.
- Two coats significantly enhance water and abrasion resistance; essential for dining tables.
- Three coats create a hard, glossy, commercial-grade finish.
Watch out
- Excessive sanding can remove the first finish layer.
- Touching the finish before fully dry leaves fingerprints and dust; wait a full 24 hours.
- 11
Complete Finish Curing Wait
≈ 10 minAfter finishing, avoid placing heavy items on the table for at least 72 hours to allow complete curing. Water-based urethane finishes fully cure in about one week. During this time, avoid eating or working on the table and lightly cover it to keep dust off.
PaintWatco oil / varnishPaintSTEP 11 / 12Tip
- Curing time varies by finish; follow manufacturer's instructions on the can.
- Check cure by pressing lightly with a fingernail; no indentation means cured.
- Drying times vary with temperature; summer 3-4 days, winter over one week.
Watch out
- Placing hot pots on uncured finish causes melting and marks.
- Dropping dishes may chip the finish; handle carefully until fully cured.
- 12
Attaching Leg Pads and Final Checks
≈ 20 minAttach felt pads to the bottom of all four legs to protect floors. Move the table to its installation place and check horizontal level. Adjust pad thickness if wobble occurs. Confirm seating by pulling in chairs and ensuring knees do not hit aprons.
Done!Done — nice work!DoneSTEP 12 / 12Tip
- 10mm thick felt pads absorb small floor unevenness.
- Use felt pads on hard floors like wood floors; use rubber pads on tatami mats.
- If wobble persists, replace one pad with a thinner one for adjustment.
Watch out
- Not using pads risks floor damage from the table weight.
- Improper seating difference (approx. 270-300mm) reduces proper dining posture.
Warnings
- ⚠️Please drill pilot holes before inserting screws to prevent wood splitting.
Custom design
Changing the dimensions roughly scales the cut list. Get the precise calculation in the app.
Enter dimensions (mm)
Quick estimateWidth W
Depth D
Height H
Base size 1400×800×720 mm
Cut list (preview)
Total board length ≈ 20.8 m · Available at: カインズ / コメリ / コーナン / DCM
Accurate materials, prices, and cuts in the app
Per-retailer pricing, purchase links, and optimal cut layouts are auto-calculated in the app.
Examples17 examples
View all →Actual cost
¥28,182
Build time
4 h 25 min
Home center
ロイヤルホームセンター
4人掛けダイニングテーブルを自作しました。マンション住まいなので搬入できる寸法を最優先。天板はオイル仕上げ (ワトコ ナチュラル)。3 度塗りで木目がくっきり出ました。家族にも好評で作って良かった。
Actual cost
¥23,674
Build time
4 h 47 min
Home center
コーナン
市販品ではしっくりこなかったので4人掛けダイニングテーブルを自分で組みました。周りに何もない環境なので電動工具をフル活用。ウリンを使ったので、初期費用は張りますが長期的にはこちらが安いと割り切ってます。天板はオイル仕上げ (ワトコ ナチュラル)。3 度塗りで木目がくっきり出ました。想定以上に綺麗に仕上がって、自分でもびっくり。
Actual cost
¥29,362
Build time
6 h 1 min
Home center
DCM
気になっていた4人掛けダイニングテーブルにようやく挑戦。築年数が経った家なので、雰囲気に合わせて少し重めの作りに。メイン材は今回もイタウバ。雨ざらしでも 10 年は安心です。ハードメープルは硬くて加工が大変ですが、傷が付きにくいので食卓向きです。家族にも好評で作って良かった。
Actual cost
¥20,092
Build time
7 h 41 min
Home center
DCM
気になっていた4人掛けダイニングテーブルにようやく挑戦。天板はオイル仕上げ (ワトコ ナチュラル)。3 度塗りで木目がくっきり出ました。ホームセンター店員さんに相談しながら進めたのが良かった。
Actual cost
¥12,258
Build time
5 h 8 min
Home center
カインズ
4人掛けダイニングテーブルを自作しました。脚はホゾ組みで強度を確保。組んだ後の安定感が違います。結果には満足してます。
Actual cost
¥14,856
Build time
4 h 37 min
Home center
DCM
市販品ではしっくりこなかったので4人掛けダイニングテーブルを自分で組みました。一人暮らしなので一人で組み立てられる構造に。ハードメープルは硬くて加工が大変ですが、傷が付きにくいので食卓向きです。家族にも好評で作って良かった。
Ratings
Comments5
- Nanami2026/04/26

幕板を太めにして天板裏で雇い実継ぎすると、長年使っても歪みにくいです
- DIY道_822026/04/26

脚は集成材より無垢のほうが反りにくいです、参考まで
- mokkou_pdf_812026/04/26

天板の幅、思ってたより使えそう。デスク用に作ってみたいです
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