Enter your Construction level and select a milestone target to get a complete roadmap.
A crystal saw gives +3 and an orange spicy stew up to +5. Stacked, they let you build level 84 items at 76.
Level 50 Portal Chamber, 72 Portal Nexus, 75 Gilded Altar, 83 Jewellery Box, 84 Occult Altar, 92 Crystalline Nexus.
👆 Enter your values above and click Calculate to get your personalized results.
Stop Training Blindly — Plan Your Next Unlock. Instead of grinding random levels, focus on the Construction milestones that actually change your gameplay. This calculator shows you exactly which POH unlock to target next, how much it costs, and whether you can boost to reach it today. or plan the whole grind with the OSRS construction calculator.
Whether you need the Ornate Pool for bossing, Portal Nexus for travel, or Gilded Altar for Prayer training, this tool creates a personalized milestone roadmap based on your current level, budget, and account type.
Your first teleport hub. Adds 3 portals per room, connecting you to Varrock, Camelot, Falador, and more. Essential for early-game travel efficiency.
Replaces all Portal Chambers with a single room housing up to 30 teleport destinations. The biggest travel upgrade in OSRS — saves inventory space and walking time.
The Gilded Altar provides 350% Prayer XP with both burners lit — the best Prayer training method in the game. Spirit Tree adds another travel network to your POH.
Full HP, Prayer, Special Attack, Run Energy, and stat restoration in one click. The single most impactful PvM upgrade. Boostable from level 82 with Crystal Saw + Spicy Stew.
Every jewellery teleport in the game, unlimited. Ring of Wealth, Games Necklace, Ring of Dueling, Amulet of Glory, Combat Bracelet, and more — all from one object.
Switch between Standard, Ancient, and Lunar spellbooks without visiting an altar. Essential for players who use multiple spellbooks for different activities.
| Milestone | Level | PvM Impact | Travel | GP Value | Priority |
|---|---|---|---|---|---|
| Ornate Pool | 82 (boost) | ★★★★★ | ★★★☆☆ | Outstanding | Critical |
| Jewellery Box | 83 (boost) | ★★★★★ | ★★★★★ | Outstanding | Critical |
| Portal Nexus | 72 | ★★★★☆ | ★★★★★ | Very High | Critical |
| Gilded Altar | 75 | ★★★★★ | ★★★★☆ | Excellent | Critical |
| Occult Altar | 84 (boost) | ★★★★☆ | ★★★☆☆ | Excellent | High |
| Crystalline Nexus | 92 | ★★★★★ | ★★★★★ | Maximum | High |
| Portal Chamber | 50 | ★★★☆☆ | ★★★★☆ | High | Medium |
| Construction Cape | 99 | ★★★☆☆ | ★★★☆☆ | Prestige | Standard |
Levels 72, 75, 82, and 83 provide the upgrades that fundamentally change gameplay. The Ornate Pool alone saves hours of bank trips during PvM. The Jewellery Box eliminates the need for dozens of teleport items.
Level 84 (Occult Altar) and 92 (Crystalline Nexus) enhance an already-strong POH. Most players won't notice as dramatic a difference compared to the critical milestones, but they add significant convenience.
Level 50 (Portal Chamber) is useful for early game but becomes obsolete once you build the Nexus. Level 99 is a prestige goal — the Construction Cape provides unlimited POH teleport and a +1 invisible boost.
Crystal Saw (+3) and Spicy Stew (+5) combine for a +8 invisible boost. This means level 82 becomes reachable at level 74, and level 83 at level 75. The calculator accounts for boosts automatically.
Mahogany Homes Expert contracts offer the lowest GP-per-XP ratio at ~3.2 GP/XP. For milestone planning, this means reaching level 82 costs ~14M GP instead of ~22M with Oak Larders. The trade-off is significantly slower XP rates.
Mahogany Tables at 900K XP/hour reach level 82 from level 1 in roughly 7 hours. The cost is much higher (~34M GP) but the time investment is dramatically lower. Ideal for players with GP to spare.
With Crystal Saw (+3) and Spicy Stew (+5), you reach milestones 8 levels early. Train to level 75, then boost to build everything at levels 82-83. This saves ~5M GP and ~15 hours of training time.
Ironmen should prioritize Mahogany Homes for GP efficiency and target level 75 as the key milestone. With +8 boost, level 75 unlocks Ornate Pool (82) and Jewellery Box (83) — the two most impactful POH upgrades.
Train with Crude Chairs → Oak Chairs → Oak Larders. Build your first Portal Chamber at level 50 for Varrock, Camelot, and Falador portals. Cost: ~2M GP, Time: ~3 hours.
Continue with Oak Larders until level 72. Build the Portal Nexus to replace all Portal Chambers. This is the biggest quality-of-life upgrade. Cost: ~7M GP additional, Time: ~13 hours.
Train to level 75 and use Crystal Saw + Spicy Stew to boost to 83. Build Ornate Pool, Jewellery Box, Gilded Altar, and Occult Altar in one session. Cost: ~4M GP additional.
Optional. Continue training for the Construction Cape. Provides unlimited POH teleport and +1 invisible boost. Cost: ~40-50M GP additional, Time: ~50 hours.
Obtained from the Eyes of Glouphrie quest. Provides a +3 invisible Construction boost that works only for building objects — not for removing them. Stacks with Spicy Stew. The saw has 28 charges and can be recharged at Brimstail's cave.
Orange spice stew from the Evil Dave subquest of Recipe for Disaster. Provides a random boost of +1 to +5 (or -1 to -5). Keep trying until you hit +5. Combine with Crystal Saw for +8 total. Drain rate: 1 level per minute.
Made in your Kitchen at level 20 Cooking. Provides +1 Construction boost (regular) or +2 (white lily tea). Cheaper to obtain than Spicy Stew but much lower boost.
Build your most level-demanding furniture first when using boosts, as the stew boost drains over time. Pre-gather all materials before sipping the stew. Optimal order: Ornate Pool → Jewellery Box → Occult Altar.
Compares your current level against OSRS Construction milestones and identifies the most impactful next unlock. Auto-mode selects the highest-priority milestone you haven't reached.
Accounts for Crystal Saw (+3) and Spicy Stew (+5) boosts. If your effective level already reaches the milestone, the calculator tells you to boost and build now instead of training further.
Calculates total XP gap, then applies your selected training method's XP-per-action, plank cost, and XP-per-hour rates to produce GP cost, plank count, and time estimates.
Each milestone has a priority score based on PvM impact, travel utility, and GP value saved. Critical milestones score 5/5, while standard milestones score 3/5.
After showing your current milestone target, identifies the next milestone after that — giving you a two-step plan for continuous improvement.