OSRS Construction Calculator — Plan XP, Materials & Cost to 99

Calculate the exact XP needed, plank requirements, and total GP cost for any Construction training method in Old School RuneScape. Optimize your POH grind with precision.

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OSRS Construction Calculator

Enter your current and target Construction levels, select a training method, and adjust plank prices to calculate total XP, items needed, plank count, and estimated GP cost.

Enter your levels, select a training method, and adjust plank prices. Then click Calculate Construction to see results.

OSRS Construction XP Formula Explained

The OSRS Construction XP curve uses the same exponential formula as all other skills in Old School RuneScape. Understanding this formula helps you plan your training efficiently.

XP per level = floor((level − 1 + 300 × 2(level−1)/7) / 4)
Total XP at level L = Σn=1L−1 floor((n + 300 × 2n/7) / 4)

The total XP to reach level 99 is 13,034,431 XP. Each successive level requires progressively more experience — level 98 to 99 alone demands over 1.2 million XP. The calculator computes the exact XP gap between any two levels using this precise formula.

XP Milestones Reference

LevelXP at LevelXP to NextNotable Unlock
3318,2472,202Oak Larders
52123,66014,768Mahogany Tables
66496,25446,789Teak Garden Benches
741,096,27886,845Oak Dungeon Doors
771,475,581110,336Gnome Benches
9913,034,431—Construction Cape

OSRS Construction Training Methods Compared

Choosing the right training method balances XP per hour, GP cost per XP, and intensity level. Here's a comprehensive comparison of the most popular methods:

MethodLevel ReqXP/BuildPlanks/BuildApprox. Builds/HrXP/Hr
Oak Larders334808 Oak~450~216,000
Mahogany Tables528406 Mahogany~400~336,000
Teak Garden Benches665406 Teak~450~243,000
Oak Dungeon Doors7460010 Oak~500~300,000
Gnome Benches778406 Mahogany~400~336,000

Oak-based methods offer the lowest GP/XP ratio but require more time. Mahogany methods provide the fastest XP rates at a premium cost. Teak sits in the middle as a balanced option for mid-level training.

OSRS Construction Cost Calculation Examples

Example 1: Oak Larders from Level 33 to 50

XP at Level 33: 18,247 → XP at Level 50: 101,333 → XP Needed: 83,086

Items to build: 83,086 ÷ 480 = 174 Oak Larders
Oak Planks: 174 × 8 = 1,392 planks
Cost at 420 GP/plank: ~584,640 GP

Example 2: Mahogany Tables from Level 52 to 99

XP at Level 52: 123,660 → XP at Level 99: 13,034,431 → XP Needed: 12,910,771

Items to build: 12,910,771 ÷ 840 = 15,370 Mahogany Tables
Mahogany Planks: 15,370 × 6 = 92,220 planks
Cost at 2,200 GP/plank: ~202,884,000 GP

Example 3: Oak Dungeon Doors from Level 74 to 85

XP at Level 74: 1,096,278 → XP at Level 85: 3,258,594 → XP Needed: 2,162,316

Items to build: 2,162,316 ÷ 600 = 3,604 Oak Doors
Oak Planks: 3,604 × 10 = 36,040 planks
Cost at 420 GP/plank: ~15,136,800 GP

Key POH Milestone Levels in OSRS Construction

Construction unlocks some of the most valuable player-owned house features in OSRS. Plan your training around these key milestones:

  • Level 50 — Portal Chamber: Build teleport portals to major destinations, saving inventory space and travel time.
  • Level 65 — Gilded Altar: Offers 350% Prayer XP when used with burners lit, essential for efficient Prayer training.
  • Level 72 — Portal Nexus (basic): Consolidates multiple teleports into a single hotspot with easier management.
  • Level 82 — Ornate Rejuvenation Pool: Fully restores HP, prayer, run energy, and cured poison/venom — a PvM game-changer.
  • Level 90 — Occult Altar: Allows spellbook swaps without visiting the Pyramid, saving significant PvM preparation time.
  • Level 92 — Portal Nexus (highest tier): Maximum teleport capacity with 30+ destination slots for ultimate convenience.
  • Level 99 — Construction Cape: Unlimited POH teleports and a stylish cape emote for the dedicated skiller.

People Also Ask About OSRS Construction

OSRS uses a precise XP curve where the XP required to reach level L equals the sum of floor((n-1 + 300 * 2^((n-1)/7)) / 4) for n from 1 to L-1. Each level requires progressively more XP, with level 99 requiring approximately 13,034,431 total XP. The calculator uses this exact formula to determine the XP gap between your current and target levels.
Mahogany Tables (level 52) and Gnome Benches (level 77) are among the fastest methods, offering 840 XP per build. At higher intensity, players can achieve over 800k XP per hour with these methods. Mythical Cape Racks and advanced furniture builds also offer competitive rates. The calculator shows estimated time based on typical builds-per-hour rates for each method.
Using Oak Larders from level 33 to 99, you would need approximately 217,000 oak planks. This varies based on your starting level. At current market prices, this typically costs between 10-20 million GP. The calculator provides precise plank counts based on your specific level range and chosen training method.
The Portal Nexus requires level 72 Construction to build the basic version, with higher-tier versions requiring up to level 92. Other important milestones include level 50 for a Portal Chamber, level 65 for a Gilded Altar, and level 82 for an Ornate Rejuvenation Pool. The calculator helps plan your path to these key milestones.
Yes, 99 Construction unlocks the maximum-level POH features including the Ornate Rejuvenation Pool, Occult Altar, and highest-tier Portal Nexus. A maxed POH is considered one of the most valuable investments in OSRS for efficient PvM and skilling. The Construction cape also provides unlimited teleports to your house, saving significant travel time.

Frequently Asked OSRS Construction Questions

Yes. The calculator implements the precise OSRS XP formula: floor((level-1 + 300 * 2^((level-1)/7)) / 4) for each level. All XP totals match the official in-game values exactly. We cross-reference against the OSRS Wiki XP table to ensure 100% accuracy for every level from 1 to 99.
Absolutely. The calculator includes editable price fields for Oak, Teak, and Mahogany planks with sensible default values. Update these to match current Grand Exchange prices for the most accurate cost projection. Prices fluctuate regularly, so we recommend checking the live GE before finalizing your training budget.
The calculator validates that your current level meets the selected method's level requirement. If your current level is below the method's threshold, you'll see a validation error. Choose a lower-level method or adjust your current level input to a value that meets the requirement.
Builds-per-hour estimates are based on community-reported averages for moderate-intensity training. Oak Larders and Doors allow ~450-500 builds/hr with efficient butler use. Mahogany/Teak methods average ~400-450 builds/hr due to higher plank costs per inventory. Actual rates vary with butler type, house layout, and player focus.
The calculator shows base XP values without boosts. For boosted training, multiply the items-needed count by the inverse of your boost. For example, with the Construction Cape's 5% boost, divide the item count by 1.05. This gives you a conservative estimate that ensures you gather enough materials.
Yes. Many players plan multiple skill grinds simultaneously. Use the Construction Calculator to budget your POH upgrades, then switch to the OSRS Herblore Calculator for potion planning. Combined with the OSRS Dry Calculator for bossing prep, NumbrWiz provides a complete OSRS skilling toolkit.

OSRS Construction Glossary

XP Curve

The exponential formula determining XP required per level. XP(L) = floor((L-1 + 300 × 2^((L-1)/7)) / 4). Total XP at 99 equals 13,034,431.

Oak Planks

The most cost-effective plank type for Construction training. Used in Oak Larders and Oak Dungeon Doors. Currently trade around 400-450 GP each on the Grand Exchange.

Mahogany Planks

Premium planks offering the highest XP per build. Used in Mahogany Tables and Gnome Benches. Significantly more expensive at ~2,200 GP each but provide faster XP rates.

Teak Planks

Mid-tier planks balancing cost and XP. Used in Teak Garden Benches at level 66. Priced around 900-1,000 GP each, offering a middle ground for budget-conscious trainers.

POH (Player-Owned House)

Your personal instance in OSRS where Construction objects are built. A well-designed POH with pools, altars, and portals is one of the most valuable assets for efficient gameplay.

Butler

An NPC servant that fetches planks from your bank during training. The Demon Butler (level 50+ Construction) is fastest, carrying 26 planks per trip for maximum XP/hr efficiency.

Ornate Rejuvenation Pool

Requires level 82 Construction. Fully restores HP, prayer points, run energy, special attack, and cures poison/venom. Essential endgame POH feature for all PvM activities.

Construction Cape

Awarded at level 99 Construction. Provides unlimited teleports to your POH entrance and a 5% XP boost when training Construction beyond 99 for virtual levels or 200M XP.

Editorial Review & Methodology

This OSRS Construction calculator was built and reviewed by the NumbrWiz Editorial Team. The XP curve implementation follows the official Old School RuneScape formula verified against the OSRS Wiki XP table. All training method data (XP per build, plank requirements, level thresholds) is cross-referenced with in-game values and community-verified sources.

  • Formula verification: The XP formula matches Jagex's official OSRS skill curve. Each level's total XP has been spot-checked against the OSRS Wiki for accuracy.
  • Training method data: Build XP, plank counts, and level requirements verified against in-game Construction skill guide values.
  • Edge case testing: Tested with boundary levels (1→2, 98→99), equal levels, invalid ranges, and all five training methods across all level combinations.
  • Cost estimates: Plank prices use community-sourced Grand Exchange averages. Users should verify current prices before committing to large purchases.

Transparency note: All calculations run client-side in your browser. No data is ever collected, stored, or transmitted. This is an unofficial fan utility tool not affiliated with or endorsed by Jagex. Results are for planning and educational purposes. Verify critical calculations independently and always check current Grand Exchange prices before buying materials.

Page last reviewed: May 2026 · NumbrWiz Editorial Team